1227
However , contrary to our belief that they could talk on the phone for a long time when they called , approximately 50 percent of the left - behind children we surveyed talked on the phone with their parents for three minutes or so .
 percent: approximately 50 percent; time: three minutes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 percent: approximately 50 percent; time: three minutes