9000
In real-world action recognition problems , low-level features can not adequately characterize the rich spatial-temporal structures in action videos .
 rich spatial-temporal structures, action videos
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 rich spatial-temporal structures, action videos