code: def meaning(utterance):
      defined = filter(
          lambda w: "" != w.syn(),
          list(map(lexical_meaning, utterance.split(" "))),
      )
      return combine_meanings(list(defined))
  
imports: import argparse
  import collections
  import torch
  from search_inference import BestFirstSearch, HashingMarginal, memoize
  import pyro
  import pyro.distributions
label_desc: Use image node_id 12 for calling a global function with example usage: meaning(utterance) and returns: combine_meanings