Instructions: In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Input: Barcelona is the second solo album recorded by Freddie Mercury, frontman of popular British rock band Queen, and operatic soprano Montserrat Caballe. Released in 1988. It is the second and final solo album recorded by Mercury. Question: Barcelona is the second solo album recorded by a singer known for his four-octave what? Answer: vocal range
Output:
Barcelona is the second solo album recorded by Freddie Mercury, frontman of popular British rock band Queen, and operatic soprano Montserrat Caballe.