{'elements': [{'handle': 'urn:li:emailAddress:319371470',
               'handle~': {'emailAddress': 'raymond.penners@intenct.nl'}}]}

def _extract_email(data):
    """
    {'elements': [{'handle': 'urn:li:emailAddress:319371470',
               'handle~': {'emailAddress': 'raymond.penners@intenct.nl'}}]}
    """
    ret = ''
    elements = data.get('elements', [])
    if len(elements) > 0:
        ret = elements[0].get('handle~', {}).get('emailAddress', '')
    return ret