1	1	contig	\N	4	default_version,sequence_level
2	1	chromosome	GRCh37	1	default_version
3	1	supercontig	GRCh37	2	default_version
4	1	clone	\N	3	default_version
27	1	chromosome	NCBI36	5	
101	1	chromosome	NCBI35	6	
1001	1	chromosome	NCBI34	7	
1003	1	lrg	\N	8	default_version