In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Context: Boosted by the success of its number-one lead single "The Boy Is Mine", a duet with singer Monica, Link Information: with sales of 2,591,000 Question: How many copies did the single that featured a duet with Monica sell?
Answer: 2,591,000