code: def __init__(self, timeout=60):
      self._timeout = timeout
      """The timeout value for prover9.  If a proof can not be found
             in this amount of time, then prover9 will return false.
             (Use 0 for no timeout.)"""
  
imports: import os
  import subprocess
  import nltk
  from nltk.inference.api import BaseProverCommand, Prover
  from nltk.sem.logic import AllExpression, AndExpression, EqualityExpression, ExistsExpression, Expression, IffExpression, ImpExpression, NegatedExpression, OrExpression
label_desc: Use image node_id 1 to create a new Prover9 object from inherited base classes: Prover9Parent, Prover with example: obj = Prover9(timeout)