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'.
Q: Context: Piece by Piece" made its debut chart appearance on the Billboard Adult Top 40 Link Information: allowing it to debut on the Billboard Digital Songs chart at number 35 and at number 18 on the Billboard Bubbling Under Hot 100 Singles chart in the issue dated the week ending March 12, 2016. Question: How many different charts was piece by piece on at the same time in 2016?
A:
Answer: 3