code: def higher_is_better(self):
      return {
          "f1": True,
          "em": True,
      }
  
imports: import numpy
  from collections import defaultdict
  from lm_eval.base import rf, Task
label_desc: Use image node_id 14 for calling the MCTACO obj's underlying member method code with example usage: obj.higher_is_better() and returns: dict