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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_link_text_from_selector(selector):
 """ A basic method to get the link text from a link text selector. """

    if selector.startswith('link='):
        return selector.split('link=')[1]
    elif selector.startswith('link_text='):
        return selector.split('link_text=')[1]
    return selector