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The experimental results show that SRDA works well on recognition and classification , implying that semi-Riemannian geometry is a promising new tool for pattern recognition and machine learning .
 used for: SRDA, recognition; used for: SRDA, classification; conjunction: recognition, classification; used for: semi-Riemannian geometry, pattern recognition; used for: semi-Riemannian geometry, machine learning; conjunction: pattern recognition, machine learning
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:  SRDA, recognition; SRDA, classification; recognition, classification; semi-Riemannian geometry, pattern recognition; semi-Riemannian geometry, machine learning; pattern recognition, machine learning 
Answer:
 used for: SRDA, recognition; used for: SRDA, classification; conjunction: recognition, classification; used for: semi-Riemannian geometry, pattern recognition; used for: semi-Riemannian geometry, machine learning; conjunction: pattern recognition, machine learning