def scrape_col(soup, tag, extended = False):
    """Return list of column headers

    Args:
        soup (BeautifulSoup): Navigable BeautifulSoup obj
        tag (str): tag you are wishing to locate

    Returns:
        list: list of column headers
    """    
    col_labels = []
    for col in soup.thead.find_all(tag):
        col_labels.append(col.text)
    if extended == True:
        return col_labels[1:]
    else:
        return ['Year'] + col_labels[1:]