Multi-column sections extending to to multiple pages fails

First of all, i want to thank you for writing such robust algorithm for pdf parsing. It handles most of the cases but particularly fails in some. One such case is Multi-column section which extends to another page fails to be parsed correctly. Here is the pdf used. [SMJ-63-753.PMC9875870.pdf](https://github.com/user-attachments/files/16577970/SMJ-63-753.PMC9875870.pdf) I have written a small parser which uses the llm-sherpa sdk to parse it to markdown format (easier to debug). ```python from llmsherpa.readers import LayoutPDFReader, Block, Paragraph, Section, LayoutReader llmsherpa_api_url = "http://localhost:5001/api/parseDocument?renderFormat=all&useNewIndentParser=yes&applyOcr=no" def convert_to_markdown(section: Section, traversed: list, level=2): """Recursively convert a section and its children to Markdown.""" if section.block_idx in traversed: return "" markdown_output = "" # Handle different types of tags if section.tag == 'header': markdown_output += f"{'#' * level} {section.title}\n\n" elif section.tag == 'para': markdown_output += f"{section.to_text(include_children=False, recurse=False)}\n\n" elif section.tag == 'list_item': markdown_output += f"- {section.to_text(include_children=False, recurse=False)}\n" elif section.tag == 'table': markdown_output += section.to_text(include_children=False, recurse=False) + "\n" traversed.append(section.block_idx) # Recursively process children print("Children: ", section.block_idx, [child.block_idx for child in section.children]) for child in section.children: markdown_output += convert_to_markdown(child, traversed, level + 1) traversed.append(child.block_idx) return markdown_output pdf_reader = LayoutPDFReader(llmsherpa_api_url) doc = pdf_reader.read_pdf("input.pdf") markdown_output = "" traversed = [] for section in doc.sections(): markdown_output += convert_to_markdown(section, traversed) with open("output-multi.md", "w") as md_file: md_file.write(markdown_output) ``` So the output of input pdf has few issues.  In this llmsherpa extracted: `An exception was the art given the context.....` But it should have been: `An exception was the art psychotherapy group, ....` Similarly,  In this llmsherpa extracted: `iii. Participation in the online ... engage fully and safely <Section from left column> iv. It is important...` But it should have been: `iii. Participation in the online... iv. It is important ... ` Thanks and regards