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The algorithm utilizes both spatial and temporal intensity variation as cues : the former constrains flow and the latter constrains surface orientation ; combining both cues enables dense reconstruction of both textured and texture-less surfaces .
 spatial and temporal intensity variation, algorithm; former, cues; former, flow; former, latter; latter, cues; latter, surface orientation; cues, dense reconstruction of both textured and texture-less surfaces
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:
 spatial and temporal intensity variation, algorithm; former, cues; former, flow; former, latter; latter, cues; latter, surface orientation; cues, dense reconstruction of both textured and texture-less surfaces