--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/TAIR10_GFF3_alignment.gff	Sun Jan 03 14:58:58 2021 +0000
@@ -0,0 +1,100 @@
+##gff-version 3
+##sequence-region   4 4174 18579887
+##sequence-region   Pt 11940 153877
+##sequence-region   3 9604 23458280
+##sequence-region   Mt 11727 332944
+##sequence-region   2 1089 19696461
+##sequence-region   1 3915 30423724
+##sequence-region   5 1227 26970443
+Pt	.	BED_feature	11940	12653	0	+	.	Name=region_0
+Pt	.	BED_feature	21863	22652	0	+	.	Name=region_1
+Pt	.	BED_feature	47925	48082	0	+	.	Name=region_2
+Pt	.	BED_feature	70139	70652	0	+	.	Name=region_3
+Pt	.	BED_feature	70946	71811	0	+	.	Name=region_4
+Pt	.	BED_feature	74848	75650	0	+	.	Name=region_5
+Pt	.	BED_feature	76490	77197	0	+	.	Name=region_6
+Pt	.	BED_feature	81589	82643	0	+	.	Name=region_7
+Pt	.	BED_feature	84773	85453	0	+	.	Name=region_8
+Pt	.	BED_feature	95704	96387	0	+	.	Name=region_9
+Pt	.	BED_feature	98026	98561	0	+	.	Name=region_10
+Pt	.	BED_feature	102404	136227	0	+	.	Name=region_11
+Pt	.	BED_feature	104306	105441	0	+	.	Name=region_12
+Pt	.	BED_feature	106980	131646	0	+	.	Name=region_13
+Pt	.	BED_feature	107004	131670	0	+	.	Name=region_14
+Pt	.	BED_feature	120378	121456	0	+	.	Name=region_15
+Pt	.	BED_feature	133209	134344	0	+	.	Name=region_16
+Pt	.	BED_feature	140089	140624	0	+	.	Name=region_17
+Pt	.	BED_feature	142263	142946	0	+	.	Name=region_18
+Pt	.	BED_feature	153197	153877	0	+	.	Name=region_19
+Mt	.	BED_feature	11727	188840	0	+	.	Name=region_20
+Mt	.	BED_feature	20719	21691	0	+	.	Name=region_21
+Mt	.	BED_feature	80134	81112	0	+	.	Name=region_22
+Mt	.	BED_feature	108929	108982	0	+	.	Name=region_23
+Mt	.	BED_feature	132215	133176	0	+	.	Name=region_24
+Mt	.	BED_feature	136074	137891	0	+	.	Name=region_25
+Mt	.	BED_feature	141941	142768	0	+	.	Name=region_26
+Mt	.	BED_feature	143479	146989	0	+	.	Name=region_27
+Mt	.	BED_feature	162155	163624	0	+	.	Name=region_28
+Mt	.	BED_feature	239003	260663	0	+	.	Name=region_29
+Mt	.	BED_feature	242068	260713	0	+	.	Name=region_30
+Mt	.	BED_feature	288110	289002	0	+	.	Name=region_31
+Mt	.	BED_feature	328080	329734	0	+	.	Name=region_32
+Mt	.	BED_feature	330308	332944	0	+	.	Name=region_33
+4	.	BED_feature	4174	4264	0	+	.	Name=region_34
+4	.	BED_feature	4440	4544	0	+	.	Name=region_35
+4	.	BED_feature	4751	4838	0	+	.	Name=region_36
+4	.	BED_feature	4903	4976	0	+	.	Name=region_37
+4	.	BED_feature	5121	5405	0	+	.	Name=region_38
+4	.	BED_feature	5590	5656	0	+	.	Name=region_39
+4	.	BED_feature	5857	6604	0	+	.	Name=region_40
+4	.	BED_feature	6678	6759	0	+	.	Name=region_41
+4	.	BED_feature	6873	6974	0	+	.	Name=region_42
+4	.	BED_feature	7058	7143	0	+	.	Name=region_43
+4	.	BED_feature	7196	7293	0	+	.	Name=region_44
+4	.	BED_feature	7640	7711	0	+	.	Name=region_45
+4	.	BED_feature	7836	8000	0	+	.	Name=region_46
+4	.	BED_feature	8157	8243	0	+	.	Name=region_47
+4	.	BED_feature	8370	8462	0	+	.	Name=region_48
+4	.	BED_feature	9439	9685	0	+	.	Name=region_49
+4	.	BED_feature	9849	9981	0	+	.	Name=region_50
+4	.	BED_feature	10127	10210	0	+	.	Name=region_51
+4	.	BED_feature	11794	11896	0	+	.	Name=region_52
+4	.	BED_feature	12018	12130	0	+	.	Name=region_53
+4	.	BED_feature	12181	12261	0	+	.	Name=region_54
+4	.	BED_feature	12442	12572	0	+	.	Name=region_55
+4	.	BED_feature	12708	12790	0	+	.	Name=region_56
+4	.	BED_feature	12811	12923	0	+	.	Name=region_57
+4	.	BED_feature	12961	13171	0	+	.	Name=region_58
+4	.	BED_feature	14030	14113	0	+	.	Name=region_59
+4	.	BED_feature	14181	14257	0	+	.	Name=region_60
+4	.	BED_feature	14835	14920	0	+	.	Name=region_61
+4	.	BED_feature	17956	18029	0	+	.	Name=region_62
+4	.	BED_feature	18515	18599	0	+	.	Name=region_63
+4	.	BED_feature	18694	18804	0	+	.	Name=region_64
+4	.	BED_feature	18872	19295	0	+	.	Name=region_65
+4	.	BED_feature	18872	19323	0	+	.	Name=region_66
+4	.	BED_feature	19675	19761	0	+	.	Name=region_67
+4	.	BED_feature	22299	22686	0	+	.	Name=region_68
+4	.	BED_feature	23201	23273	0	+	.	Name=region_69
+4	.	BED_feature	23386	23457	0	+	.	Name=region_70
+4	.	BED_feature	23386	23461	0	+	.	Name=region_71
+4	.	BED_feature	23386	23470	0	+	.	Name=region_72
+4	.	BED_feature	25220	25293	0	+	.	Name=region_73
+4	.	BED_feature	25412	25558	0	+	.	Name=region_74
+4	.	BED_feature	25681	25817	0	+	.	Name=region_75
+4	.	BED_feature	25743	25817	0	+	.	Name=region_76
+4	.	BED_feature	25882	26338	0	+	.	Name=region_77
+4	.	BED_feature	26412	26500	0	+	.	Name=region_78
+4	.	BED_feature	26754	26868	0	+	.	Name=region_79
+4	.	BED_feature	26754	26883	0	+	.	Name=region_80
+4	.	BED_feature	27005	27218	0	+	.	Name=region_81
+4	.	BED_feature	27005	27245	0	+	.	Name=region_82
+4	.	BED_feature	27010	27218	0	+	.	Name=region_83
+4	.	BED_feature	27280	27382	0	+	.	Name=region_84
+4	.	BED_feature	27425	27521	0	+	.	Name=region_85
+4	.	BED_feature	27601	27687	0	+	.	Name=region_86
+4	.	BED_feature	27774	27867	0	+	.	Name=region_87
+4	.	BED_feature	28021	28155	0	+	.	Name=region_88
+4	.	BED_feature	28078	28155	0	+	.	Name=region_89
+4	.	BED_feature	28283	28372	0	+	.	Name=region_90
+4	.	BED_feature	28283	28398	0	+	.	Name=region_91