Definition: 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'.
Input: Context: On the same night, TNA were set to host their annual Sacrifice pay-per-view event, Link Information: Sacrifice (2016) (aka Impact Wrestling: Sacrifice) was a professional wrestling television special produced by Total Nonstop Action Wrestling (TNA), The show was taped on March 19, 2016 at the Impact Zone in Orlando, Florida and Aired on Pop TV on April 26, 2016. It was the tenth event under the Sacrifice chronology. Unlike the previous events, this event was not included on pay-per-view (PPV) and instead, was featured as a special edition of TNA's weekly broadcast of Impact Wrestling on Pop TV.

Question: How many years did the Sacrifice pay-per-view-event happen?
Output:
Answer: 10