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!7

p-exp {
  for (Pair<S> p : ll(
    pair("I called my mother", "I called my brother"),
    pair("It's time for tea", "What time is it"))) {
    print("\n" + p);
    PTElement tree1 = ai_parseBottomUpToTree(p.a);
    PTElement tree2 = ai_parseBottomUpToTree(p.b);
    
    L<Pair<O>> matches = ai_matchParseTrees_v2(tree1, tree2);
    //pnl(flattenListOfPairs(matches));
    
    // Quick&Dirty matching using PTElement/WeightedProduction.toString()
    matches = dropPairsWithSameToStringOnBothSidesIC(matches);
    
    //print("\nSimplified.");
    pnl(map(func(O o) -> S {
      O oo = o instanceof Pair ? second(o/Pair);
      ret oo instanceof PTElement ? str(o) + " (depth=" + ptElement_depth(oo/PTElement) + ")" : str(o);
    }, flattenListOfPairs(matches)));
  }
}