Read the given query and classify it as a 'Good' or 'Bad' query depending on how well the query is formed, 'Bad' being the expected output for a not so well formed query and 'Good' being the expected output for a well formed query. A query may be wrong based on common sense or general facts, but if it is well formed, you should answer with Good.

But how did david and selena ?
Bad

Are ducks silly bands rare ?
Bad

How do you scan a picture using a hp photosmart c3100 ?

Good