code: def start(self):
      return self.spans[0].bbox[0]
  
imports: from collections import Counter
  from typing import List, Optional, Tuple
  from pydantic import BaseModel, field_validator
  import ftfy
  from marker.bbox import boxes_intersect_pct, multiple_boxes_intersect
  from marker.settings import settings
label_desc: Use image node_id 2 for calling the Line obj's underlying member method code with example usage: obj.start() and returns: self