5049
For this purpose , a flow field generated by a moving crowd is treated as an aperiodic dynamical system .
 used for: moving crowd, flow field; used for: aperiodic dynamical system, flow field
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  moving crowd, flow field; aperiodic dynamical system, flow field 
Answer:
 used for: moving crowd, flow field; used for: aperiodic dynamical system, flow field