. tsg transcript . . . . . transcript_id "0";
chr1 tsg exon 1000 1200 . + . exon_id "000"; ptc "10"; expression "10.5"; segment_id "000"; transcript_id "0";
chr1 tsg exon 1500 1700 . + . exon_id "001"; ptc "10"; expression "10.5"; segment_id "000"; transcript_id "0";
chr1 tsg exon 2500 2700 . + . exon_id "000"; segment_id "001"; segment_id "000"; transcript_id "0";
chr1 tsg exon 2500 2700 . - . exon_id "000"; segment_id "002"; segment_id "001"; segment_id "000"; transcript_id "0";
. tsg transcript . . . . . transcript_id "1";
chr1 tsg exon 2000 2200 . + . exon_id "000"; segment_id "000"; transcript_id "1";
chr1 tsg exon 2500 2700 . + . exon_id "000"; segment_id "001"; segment_id "000"; transcript_id "1";
chr1 tsg exon 2500 2700 . + . exon_id "000"; segment_id "002"; segment_id "001"; segment_id "000"; transcript_id "1";