9044
In recent studies an enhancement of the ionic conductivity was indeed observed in micro - / nanoscaled Y ( 2 ) O ( 3 ) - stabilised ZrO ( 2 ) ( YSZ ) composites and hetero multilayers of thin films .
 Chemical: Y ( 2 ) O ( 3 ); Chemical: ZrO ( 2 ); Chemical: YSZ
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: Y ( 2 ) O ( 3 ); Chemical: ZrO ( 2 ); Chemical: YSZ