unstructured

4d12c61c - added parent_element as output for overlapping cases (#2507)

added parent_element as output for overlapping cases (#2507) To provide more utility to the `catch_overlapping_and_nested_bboxes` and `identify_overlapping_or_nesting_case` functions, included parent_element as part of the output. This would allow user to - identify the parent element in the overlapping case: `nested {type*} in {type*}`. Currently, if the element types is similar, an example case output would be `nested Image in Image` which is confusing. - easily identify elements to keep or delete