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': 'find_beer', 'description': 'Recommend a beer based on specified attributes such as brewery, taste, aroma, color, style, and more. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['brewery', 'taste', 'aroma', 'color', 'style'], 'properties': {'brewery': {'type': 'string', 'description': 'The brewery name to find similar beers.'}, 'taste': {'type': 'string', 'description': "The desired taste profile in the beer, such as 'bitter', 'sweet', 'sour'."}, 'aroma': {'type': 'string', 'description': "The desired aroma profile in the beer, such as 'fruity', 'hoppy', 'malty'."}, 'color': {'type': 'string', 'description': "The desired color of the beer, such as 'pale', 'amber', 'dark'."}, 'style': {'type': 'string', 'description': "The style of beer being searched for, such as 'IPA', 'stout', 'lager'."}, 'abv_min': {'type': 'float', 'description': 'The minimum alcohol by volume (ABV) percentage, typically a value under 12.5%.', 'default': 0.0}, 'abv_max': {'type': 'float', 'description': 'The maximum alcohol by volume (ABV) percentage, a value logically above 0%.', 'default': 12.5}, 'ibu_min': {'type': 'integer', 'description': 'The minimum International Bitterness Units (IBU) score, typically a value under 120.', 'default': 0}, 'ibu_max': {'type': 'integer', 'description': 'The maximum International Bitterness Units (IBU) score, logically above 0.', 'default': 120}, 'pairings': {'type': 'array', 'items': {'type': 'string'}, 'description': "A list of food items to pair with the beer, such as 'burger', 'cheese', 'chocolate'.", 'default': []}}}}]


user: Could you recommend a lager that's bitter, has a hoppy aroma, and presents a pale color from Sierra Nevada brewery?

Available functions:
[{"name": "find_beer", "description": "Recommend a beer based on specified attributes such as brewery, taste, aroma, color, style, and more.", "parameters": {"type": "dict", "required": ["brewery", "taste", "aroma", "color", "style"], "properties": {"brewery": {"type": "string", "description": "The brewery name to find similar beers."}, "taste": {"type": "string", "description": "The desired taste profile in the beer, such as 'bitter', 'sweet', 'sour'."}, "aroma": {"type": "string", "description": "The desired aroma profile in the beer, such as 'fruity', 'hoppy', 'malty'."}, "color": {"type": "string", "description": "The desired color of the beer, such as 'pale', 'amber', 'dark'."}, "style": {"type": "string", "description": "The style of beer being searched for, such as 'IPA', 'stout', 'lager'."}, "abv_min": {"type": "float", "description": "The minimum alcohol by volume (ABV) percentage, typically a value under 12.5%.", "default": 0.0}, "abv_max": {"type": "float", "description": "The maximum alcohol by volume (ABV) percentage, a value logically above 0%.", "default": 12.5}, "ibu_min": {"type": "integer", "description": "The minimum International Bitterness Units (IBU) score, typically a value under 120.", "default": 0}, "ibu_max": {"type": "integer", "description": "The maximum International Bitterness Units (IBU) score, logically above 0.", "default": 120}, "pairings": {"type": "array", "items": {"type": "string"}, "description": "A list of food items to pair with the beer, such as 'burger', 'cheese', 'chocolate'.", "default": []}}}}]

Ground-truth function call:
[{"find_beer": {"brewery": ["Sierra Nevada"], "taste": ["bitter"], "aroma": ["hoppy"], "color": ["pale"], "style": ["lager"], "abv_min": ["", 0.0], "abv_max": ["", 12.5], "ibu_min": ["", 0], "ibu_max": ["", 120], "pairings": ["", []]}}]