1598
He made his second debut for the club on 21 January 2015 , in a 4 – 0 defeat against his former club Celtic .
 organization: Celtic
Please list all entity words in the text that fit the category.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} 
Answer:
 organization: Celtic