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: Gasparino then moved to cable business network CNBC where he reported extensively on Wall Street. Link Information: CNBC was originally established on April 17, 1989 as a joint venture between NBC and Cablevision as the Consumer News and Business Channel. Question: What year did the cable network Gasparino worked for first go on air?
Answer: April 17, 1989