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In order to make seagulls act on cue and perform aerobatics , Mark Smith of Escondido , California built radio-controlled gliders that looked like real seagulls from a few feet away .
 Mark Smith, Escondido, California
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Mark Smith, Escondido, California