5574
A comparison with results from recent crossed molecular beam studies of the 1 , 3 - butadiene - phenyl radical reaction and electronic structure calculations suggests that trans - 1 , 3 - butadienylbenzene ( 130 amu ) , 1 , 4 - dihydronaphthalene ( 130 amu ) , and styrene ( 104 amu ) are reaction products formed as a consequence of a bimolecular reaction between the phenyl radical and 1 , 3 - butadiene .
 Chemical: 1 , 3 - butadiene - phenyl; Chemical: trans - 1 , 3 - butadienylbenzene; Chemical: 1 , 4 - dihydronaphthalene; Chemical: styrene; Chemical: phenyl; Chemical: 1 , 3 - butadiene
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: 1 , 3 - butadiene - phenyl; Chemical: trans - 1 , 3 - butadienylbenzene; Chemical: 1 , 4 - dihydronaphthalene; Chemical: styrene; Chemical: phenyl; Chemical: 1 , 3 - butadiene