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Due to the capacity of pan-tilt-zoom -LRB- PTZ -RRB- cameras to simultaneously cover a panoramic area and maintain high resolution imagery , researches in automated surveillance systems with multiple PTZ cameras have become increasingly important .
 used for: pan-tilt-zoom -LRB- PTZ -RRB- cameras, panoramic area; used for: pan-tilt-zoom -LRB- PTZ -RRB- cameras, high resolution imagery; feature of: PTZ cameras, automated surveillance systems
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:  pan-tilt-zoom -LRB- PTZ -RRB- cameras, panoramic area; pan-tilt-zoom -LRB- PTZ -RRB- cameras, high resolution imagery; PTZ cameras, automated surveillance systems 
Answer:
 used for: pan-tilt-zoom -LRB- PTZ -RRB- cameras, panoramic area; used for: pan-tilt-zoom -LRB- PTZ -RRB- cameras, high resolution imagery; feature of: PTZ cameras, automated surveillance systems