def forecasted_occlusion_position(occlusion_bool_list):
    """ Given a boolean list of occlusion events, return the index position of the forecasts
        that indicate that an occlusion event has been predicted. """
    
    positional_list = []
    
    for i in range(len(occlusion_bool_list)):
        if occlusion_bool_list[i] == "Yes":
            positional_list.append(i)
    
    return positional_list