##fileformat=VCFv4.2
##FILTER=<ID=PASS,Description="All filters passed">
##reference=file://some/path/dummy.fas
##contig=<ID=chr1,length=235147>
##FORMAT=<ID=AO,Number=.,Type=Integer,Description="Alternate allele observation count">
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	S1	S2	S3
chr1	251	.	C	T	68	.	.	GT:AO	./.:3,4	0/0:2,4,5	0/1:3,4,5
