29750
But because first - quarter demand is normally the weakest of the year , several market participants say , OPEC production will have to decline to keep prices from eroding further .
 date: first - quarter; date: the year; organization: OPEC
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: first - quarter, the year, OPEC 
Answer:
 date: first - quarter; date: the year; organization: OPEC