Sentence:  The crow's name was Betty. And she was on her way to stardom. A <WSD>gaggle</WSD> of Oxford University scientists watched in wonder as she casually picked up a piece of wire in her cage and then used a nearby object to bend it at one end, transforming the wire into a hooked tool. 
Meaning of the word marked with <WSD> tags:  Any group or gathering of related things.