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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 _maybe_get(elt, item, info, conversion=None):
 """Extract and convert info if item is present."""

    maybe_item = elt.find(item)
    if maybe_item is not None:
        maybe_item = maybe_item.get(info)
        if conversion is not None:
            maybe_item = conversion(maybe_item)
    return maybe_item