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In this paper , we cast the problem of point cloud matching as a shape matching problem by transforming each of the given point clouds into a shape representation called the Schrödinger distance transform -LRB- SDT -RRB- representation .
 used for: shape matching problem, point cloud matching; used for: shape representation, point clouds; hyponym of: Schrödinger distance transform -LRB- SDT -RRB- representation, shape representation
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:  shape matching problem, point cloud matching; shape representation, point clouds; Schrödinger distance transform -LRB- SDT -RRB- representation, shape representation 
Answer:
 used for: shape matching problem, point cloud matching; used for: shape representation, point clouds; hyponym of: Schrödinger distance transform -LRB- SDT -RRB- representation, shape representation