##fileformat=VCFv4.1
##contig=<ID=1,assembly=b37,length=249250621>
##reference=file:///ref.fa
##INFO=<ID=AC,Number=A,Type=Integer,Description="Allele count in genotypes">
##INFO=<ID=AN,Number=1,Type=Integer,Description="Total number of alleles in called genotypes">
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO
1	10	.	C	T	.	.	AN=4;AC=1
