1403
He turned down W. S. Gilbert 's offer of a collaboration , and wrote only two stage works between 1898 and 1914 .
 person: W. S. Gilbert
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: W. S. Gilbert