class_docstr: Subclass of style gen agent that appends "no_bias" to every example's context.
code: def get_temp_history(self, observation: Message) -> Optional[str]:
      return STYLE_SEP_TOKEN + "no_bias"
  
imports: from typing import Optional
  from parlai.core.message import Message
  from projects.style_gen.modules import STYLE_SEP_TOKEN
  from projects.style_gen.style_gen import StyleGenAgent
label_desc: Use image node_id 1 for calling the NoBiasStyleGenAgent obj's underlying member method code with example usage: obj.get_temp_history(observation) and returns: unknown