def _read_line4(line, nasa_data):
    """Reads the third line of a thermdat specie

    Parameters
    ----------
        line : str
            Line 3 of thermdat specie
        nasa_data : dict
            Pre-filled Nasa input fields
    Returns
    -------
        nasa_data : dict
            Nasa input fields
    """
    # Locations to find a values
    positions = [0, 15, 30, 45]
    offset = 15

    j = 3
    for position in positions:
        nasa_data['a_low'][j] = float(line[position:position + offset])
        j += 1
    return nasa_data