Definition: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: An amide can be formed by combining a carboxylic acid and an amine. Only primary and secondary amines can be used to form amides, since they have a hydrogen that can be replaced with the carbonyl carbon; tertiary amines will not form amides. The amide shown in the Figure above was formed from a carboxylic acid and a primary amine. Answer: carboxylic acid
Output:
What can be combined with an amine to form an amide?