# Example usage:
bcftools query --format '%CHROM\t%POS\t%INFO/END\t[%GT]\n' input_file.vcf
# Where:
#    - Fixed columns like CHROM and POS are referred to as %COLUMN
#    - Info fields need to be specified as %INFO/TAG
#    - Format fields need to be enclosed in brackets
#    - The tab \t and new line \n characters are used to format the output