6279
Another study found that the 82 Fridays the 13th in the 1940 - 1987 period had higher than average returns -- higher even than Fridays in general , which tend to be strong days for stock prices .
 cardinal: 82; date: Fridays the 13th; date: 1940 - 1987; date: Fridays; date: days
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:
 cardinal: 82; date: Fridays the 13th; date: 1940 - 1987; date: Fridays; date: days