[BUG] OpenMetero prompt token count error
# [BUG] OpenMetero prompt token count error
The OpenMetero api returns a json that is large and the GPT-3 api cannot study it to return information

## What and Why?
While running the OpenMetero Lang chain the open metero api returns a large json file that is then sent to the gpt-3 api to understand, which is larger than the token size thus returning errors.

## Suggestions?
Add another step to parse json using json chain