code: def backwardTConstraint(left, right):
      arg = innermostFunction(left)
      return arg.dir().is_forward() and arg.res().is_primitive()
  
imports: from abc import ABCMeta, abstractmethod
  from nltk.ccg.api import FunctionalCategory
label_desc: Use image node_id 11 for calling a global function with example usage: backwardTConstraint(left, right) and returns: unknown