RunnableParallel in LCEL

[mail2mhossain]

In the following code, does "results_1": arguments_for and "results_2": arguments_against run in parallel? If not then how could I do it?
Code:

chain = (
planner
| {
"results_1": arguments_for,
"results_2": arguments_against,
"original_response": itemgetter("base_response"),
}
| final_responder
)

I am trying to use RunnableParallel here as follows:

chain = (
planner
| {
RunnableParallel(results_1=arguments_for),
RunnableParallel(results_1=arguments_for),
RunnableParallel(original_response=itemgetter("base_response")),
}
| final_responder
)

response = chain.invoke({"input": "scrum"}).

BUT getting error:
TypeError: unhashable type: 'RunnableParallel'