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Here we use magnetoresistance to probe both the insulating state at very low temperatures and the presence of superconducting fluctuations in La ( 2 - x ) Sr ( x ) CuO ( 4 ) films , for doping levels that range from the insulator to the superconductor ( x = 0 . 03 - 0 . 08 ) .
 Chemical: La ( 2 - x ) Sr ( x ) CuO ( 4 )
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: La ( 2 - x ) Sr ( x ) CuO ( 4 )