system: 
You are an expert in composing functions. You are given a question and a set of possible functions.
Based on the question, you will need to make one or more function/tool calls to achieve the purpose.
If none of the function can be used, point it out. If the given question lacks the parameters required by the function,
also point it out. You should only return the function call in tools call sections.

If you decide to invoke any of the function(s), you MUST put it in the format of [func_name1(params_name1=params_value1, params_name2=params_value2...), func_name2(params)]

You SHOULD NOT include any other text in the response.

Here is a list of functions in JSON format that you can invoke.

[{'name': 'get_current_weather', 'description': 'Retrieves the current weather conditions for a specified location. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['location'], 'properties': {'location': {'type': 'string', 'description': "The city and state for which to get the weather, in the format of 'City, State', such as 'San Francisco, CA' or 'New York, NY'."}, 'unit': {'type': 'string', 'description': 'The unit of measurement for temperature values.', 'enum': ['celsius', 'fahrenheit'], 'default': 'fahrenheit'}}}}, {'name': 'web_search', 'description': 'Perform a web search for a given query and return relevant results. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['query'], 'properties': {'query': {'type': 'string', 'description': 'The search query string to be used for finding relevant web pages.'}, 'results_limit': {'type': 'integer', 'description': 'The maximum number of search results to return. The value must be a positive integer.', 'default': 10}, 'language': {'type': 'string', 'description': 'The language preference for the search results.', 'enum': ['en', 'es', 'fr', 'de', 'it'], 'default': 'en'}, 'safe_search': {'type': 'boolean', 'description': 'Enable or disable safe search filtering.', 'default': True}}}}]


user: trigger web search; where is columbia universityg

Available functions:
[{"name": "get_current_weather", "description": "Retrieves the current weather conditions for a specified location.", "parameters": {"type": "dict", "required": ["location"], "properties": {"location": {"type": "string", "description": "The city and state for which to get the weather, in the format of 'City, State', such as 'San Francisco, CA' or 'New York, NY'."}, "unit": {"type": "string", "description": "The unit of measurement for temperature values.", "enum": ["celsius", "fahrenheit"], "default": "fahrenheit"}}}}, {"name": "web_search", "description": "Perform a web search for a given query and return relevant results.", "parameters": {"type": "dict", "required": ["query"], "properties": {"query": {"type": "string", "description": "The search query string to be used for finding relevant web pages."}, "results_limit": {"type": "integer", "description": "The maximum number of search results to return. The value must be a positive integer.", "default": 10}, "language": {"type": "string", "description": "The language preference for the search results.", "enum": ["en", "es", "fr", "de", "it"], "default": "en"}, "safe_search": {"type": "boolean", "description": "Enable or disable safe search filtering.", "default": true}}}}]

Ground-truth function call:
[{"web_search": {"query": ["where is columbia university"], "results_limit": ["", 10], "language": ["", "en"], "safe_search": ["", true]}}]