def determine_biallelic_samples(samples_data):

    """

    Determine the number of biallelic samples for a variant

    : Parameter samples_data: sample data for line

    : Return biallelic_sample_line_count: number of biallelic samples

    """

    # Counter for biallelic samples
    biallelic_sample_line_count = 0

    # Start looping over values to identify biallelic samples
    for sample in samples_data:

        # Clean up sample data some (remove quote marks)
        sample = sample.lstrip('"')
        sample = sample.rstrip('"')

        # Identify biallelic samples
        if sample.startswith("Biallelic"):

            # Add to the counter
            biallelic_sample_line_count += 1

    return (biallelic_sample_line_count)