def recombination_knockout(lab, award):
    return {
        'lab': lab['@id'],
        'award': award['@id'],
        'category': 'knockout',
        'purpose': 'repression',
        'method': 'site-specific recombination',
        'modified_site_by_coordinates': {
            "assembly": "GRCh38",
            "chromosome": "11",
            "start": 60000,
            "end": 62000
        }
    }