Unexpected behavior of the old parser

[NC-Zhao]

• The old parser completely ignores all annotation outside <span> tags, which happens when the annotation is applied on a whole section of the document.
• when we have structure like <span A><ix B><span C> texts on spanC <\span><\ix><\span> its is for sure that the "texts on spanC" will be labeled as unannotated on the element of <spanC>. But for ix B, it is unclear whether "texts on spanC" would be incorporated as a part of the annotation of <spanA>.