18565
Fischer - Tropsch synthesis ( FTS ) is an important catalytic process for liquid fuel generation , which converts coal / shale gas / biomass - derived syngas ( a mixture of CO and H2 ) to oil .
 Chemical: CO; Chemical: H2
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: CO; Chemical: H2