Definition: In this task, you're given a passage, 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: Passage: Martin Guptill was ruled out of New Zealand's limited-overs squads due to injury. Glenn Phillips replaced him for the T20I match and Dean Brownlie replaced him for the ODI matches. However, ahead of the fourth ODI, Guptill and Jeetan Patel were added to the ODI squad and Matt Henry was released. However, ahead of the fifth ODI, Matt Henry was added back to the ODI squad. Ross Taylor was ruled out of the New Zealand squad for the 2nd Test due to calf injury sustained during the 1st Test. Neil Broom was named as his replacement. Matt Henry was also included in the Test squad. Dane Piedt was added to South Africa's squad ahead of the second Test. With Piedt added to South Africa's squad, Chris Morris was released from the team. Trent Boult was ruled out of New Zealand's squad for the 2nd Test due to leg injury sustained during the 1st Test. Duanne Olivier was released from South Africa's squad ahead of the third Test. Tim Southee was ruled out of the final Test with a hamstring injury.
Link Information: none Question: Why was Duanne Olivier released?
Output:
Answer: none