Based on the context and the answer, generate a question. 

Context: Johnny Hartman and John Coltrane did an album together , and that 's just amazingly beautiful . They just work so well together , have such amazing respect for each other in the way John Coltrane will sit back and let Johnny sing , then step up at just the right time . Their use of one another 's strengths is fantastic .

Answer:

It is highly probable that the reader will think that the musicians produced distinct musical sounds .



What can the reader infer about the musicians specialties from the author 's observation that their use of each others ' strengths was fantastic ?