A Generative AI Engineer is testing a simple prompt template in LangChain using the code below, but is getting an error: Python from langchain.chains import LLMChain from langchain_community.llms import OpenAI from langchain_core.prompts import PromptTemplate prompt_template = " Tell me a {adjective} joke " prompt = PromptTemplate(input_variables=[ " adjective " ], template=prompt_template) # ... (Error-prone section) Assuming the API key was properly defined, what change does the Generative AI Engineer need to make to fix their chain?
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