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He remained on the backbenches for a number of years before he was one of a group of young party members handpicked by Seán Lemass to begin a re-organisation drive for the party following the defeat at the 1954 general election .
 person: Seán Lemass
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:
 person: Seán Lemass