class_docstr: The backward equivalent of the ForwardCombinator class.
class_docstr_tok: ["The","backward","equivalent","of","the","ForwardCombinator","class","."]
code: def combine(self, left, right):
      yield from self._combinator.combine(right, left)
  
imports: from abc import ABCMeta, abstractmethod
  from nltk.ccg.api import FunctionalCategory
label_desc: Use image node_id 3 for calling the BackwardCombinator obj's underlying member method code with example usage: obj.combine(left, right) without return types