381144
This document also states that the article describing its clinical effects ( analgesic studies , m - , d - , k-Opioid receptor binding and in vitro measures of drug efficacy , antinociceptive and narcotic properties ) was published in 1987 .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None