import re


def get_header_line(headr, proprty):
    """
    :param headr: the header of the RINEX-file
    :param proprty: string-like property to search for (e.g. 'delta-utc')
    :return: the string of the ``headr`` containing ``property``
    """
    pattern = re.compile(proprty, re.IGNORECASE)
    for d in headr:
        if pattern.search(d):
            return d