1143
We are the first to bring the closed form solution to such a very practical problem arising in video surveillance .
 used for: closed form solution, problem; feature of: video surveillance, problem
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:  closed form solution, problem; video surveillance, problem 
Answer:
 used for: closed form solution, problem; feature of: video surveillance, problem