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Over six seasons , he played for the Boston Celtics , Dallas Mavericks , Houston Rockets and Chicago Bulls , averaging 4.4 points , 3.3 rebounds and one steal per game .
 organization: Boston Celtics; organization: Dallas Mavericks; organization: Houston Rockets; organization: Chicago Bulls
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: Boston Celtics; organization: Dallas Mavericks; organization: Houston Rockets; organization: Chicago Bulls