You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "medias", "description": "Retrieves media posts from a specified Instagram user using the Instagram RapidAPI.", "parameters": {"user_id": {"description": "The ID of the Instagram user whose media posts are to be retrieved.", "type": "str", "default": "25025320"}, "batch_size": {"description": "The number of media posts to retrieve in a single batch, ranging from 1 to 50. Defaults to 20.", "type": "int, optional", "default": "20"}, "next_cursor": {"description": "The cursor for fetching the next set of media posts in pagination. Defaults to None.", "type": "str, optional", "default": ""}}}, {"name": "user_lookup", "description": "Fetches a detailed overview of available PeerReach data for a given Twitter user.", "parameters": {"screen_name": {"description": "The Twitter handle of the user to look up.", "type": "str", "default": "fredwilson"}}}]
Retrieve the first 20 media posts from the Instagram user 'johndoe_artist'. Additionally, look up the PeerReach data for the Twitter user 'ScienceDaily'.
user
assistant
[{"name": "medias", "arguments": {"user_id": "johndoe_artist", "batch_size": 20}}, {"name": "user_lookup", "arguments": {"screen_name": "ScienceDaily"}}]