2026
These and other expensive changes in products ranging from auto air conditioners to foam cushioning to commercial solvents are in prospect because of something called the Montreal Protocol , signed by 24 nations in 1987 .
 law: the Montreal Protocol; cardinal: 24; date: 1987
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: the Montreal Protocol, 24, 1987 
Answer:
 law: the Montreal Protocol; cardinal: 24; date: 1987