def read_from_narrative(narratives):
    """Read from narratives the defined
    value for the last defined timestep

    Arguments
    ---------
    narratives : lives
        Narratives

    Returns
    -------
    last_value : float
        Value of last defined timestep narrative
    """
    last_year = 0
    for narrative in narratives:
        if narrative['end_yr'] > last_year:
            last_value = narrative['value_ey']
            last_year = narrative['end_yr']
    return last_value
