you have three different API calls for getting different types of visual information. 
1) "database(image_id)" API - returns objects list detected on video 
2) "vqa(image_path)" API  - Visual question answering system returns answers for questions like "what is a color of the car in the picture" 
3) "crop(image_path)" API - returns patches of image, includes one object form "database" API. Please generate python code with API calls in order to answer following question: "How many boys on the picture are wearing blue t-shirts" Avoid using the following keywords: color, return, answer, code
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