Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: The militant Unite union was facing embarrassment last night over claims it ‘sacked’ an activist for complaining about being hired on a zero-hours contract. Former lecturer Martyn Reuby won the first round in his legal battle against Unite, after a tribunal ruled that he had been employed to teach its courses. The employment tribunal ruling is a major embarrassment to the union, which has led the campaign against the use of zero-hours contracts, which it says amount to ‘exploitation’. Ed Miliband was left embarrassed today after Labour's biggest backer was accused of employing workers on zero-hours contracts It is also a blow to Ed Miliband, who has received more than £13million from Unite since becoming leader in 2010.Unite accused of employing workers on contracts 'effectively zero hours'Union, which has given millions to Labour, lost a key employment tribunalLecturer Martyn Reuby says he was sacked after complaining about issueComes after Labour was accused of hypocrisy over zero-hours contracts 
 Question:The tribunal did not find that Mr _ was employed on a zero-hour contract, but rather he was employed on a series of short- term contracts.’

Martyn Reuby