11412
We report a colloidal synthesis of Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ) dumbbell nanocrystals ( NCs ) derived from Au ( 0 . 75 ) Pd ( 0 . 25 ) NCs by metal oxide overgrowth .
 Chemical: Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ); Chemical: Au ( 0 . 75 ) Pd ( 0 . 25 ); Chemical: metal oxide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ), Au ( 0 . 75 ) Pd ( 0 . 25 ), metal oxide 
Answer:
 Chemical: Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ); Chemical: Au ( 0 . 75 ) Pd ( 0 . 25 ); Chemical: metal oxide