19520
Recommended proton affinity and protonation entropy deduced from these comparisons are PA ( His ) = 980 kJ mol ( - 1 ) and Delta pS ( His ) ~ 0 J mol ( - 1 ) K ( - 1 ) , thus leading to a gas - phase basicity value of GB ( His ) = 947 . 5 kJ mol ( - 1 ) .
 Chemical: His; Chemical: His; Chemical: His
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: His; Chemical: His; Chemical: His