code: def choose_mode(self):
      st.header("Mode")
      self.mode = st.selectbox(
          label="Choose a mode",
          options=["Simplification", "Extraction"],
          index=1,
      )
  
file_path: hf-obelics/obelics/visualization/global_visualization.py
imports: import os
  import pathlib
  import random
  import pandas
  import streamlit
  from datasets import load_dataset
  from jinja2 import Template
  from obelics.processors import DOMTreeSimplificator, PreExtractionSimplificator, TextMediaPairsExtractor
  from obelics.utils import make_selectolax_tree
label_desc: Use image node_id 3 for calling the Visualization obj's underlying member method code with example usage: obj.choose_mode() without return types