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The Lesch - Nyhan syndrome is a severe X chromosome - linked human disease caused by a virtual absence of hypoxanthine - guanine phosphoribosyltransferase ( HPRT ) activity .
 Disease: Lesch - Nyhan syndrome; Disease: X chromosome - linked human disease; Disease: absence of hypoxanthine - guanine phosphoribosyltransferase ( HPRT ) activity
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: Lesch - Nyhan syndrome, X chromosome - linked human disease, absence of hypoxanthine - guanine phosphoribosyltransferase ( HPRT ) activity 
Answer:
 Disease: Lesch - Nyhan syndrome; Disease: X chromosome - linked human disease; Disease: absence of hypoxanthine - guanine phosphoribosyltransferase ( HPRT ) activity