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": "vivanews_detail", "description": "Fetches and returns the detailed news information from Vivanews by the given ID using the provided RapidAPI key.", "parameters": {"is_id": {"description": "The ID of the Vivanews article to fetch details for.", "type": "int", "default": "1612364"}}}]
Please retrieve detailed news from Vivanews for article IDs 67890 and 78901.
user
assistant
[{"name": "vivanews_detail", "arguments": {"is_id": 67890}}, {"name": "vivanews_detail", "arguments": {"is_id": 78901}}]