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His form prompted Celtic manager Martin O'Neill to spend £ 1 million to sign the player for the Glasgow giants , on a four-year contract .
 organization: Celtic; person: Martin O'Neill; location: Glasgow
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Celtic, Martin O'Neill, Glasgow 
Answer:
 organization: Celtic; person: Martin O'Neill; location: Glasgow