7419
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
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Boston Celtics, Dallas Mavericks, Houston Rockets, Chicago Bulls 
Answer:
 organization: Boston Celtics; organization: Dallas Mavericks; organization: Houston Rockets; organization: Chicago Bulls