sentences: a sheep is a mean of plant & establishing a ants requires trade other people away ->  establishing a territory can require keeping other wolves away  frame is a mean of vision & vision can be used for anticommunication by people ->  howling is used for communication by animals  howling is used for communication by animals & a sheep is a mean of plant ->  howling can be used for communication by wolves  a sheep is a mean of plant & a chromosomes is used to warn people ->  a warning can be used to warn wolves  a warning can be used to warn wolves & neutral is a mean of anticommunication ->  warning is a kind of communication that can be used to warn wolves  howling can be used for communication by wolves & warning is a kind of communication that can be used to warn wolves ->  howling is used to warn other wolves by wolves  people usually throwaway away from safety or sediments & buckeye can be used to indicate safety or tornadoes ->  warning can be used to keep animals away  warning can be used to keep animals away & a sheep is a mean of plant ->  warning can be used to keep wolves away  howling is used to warn other wolves by wolves & warning can be used to keep wolves away ->  howling is used by wolves to keep other wolves away  establishing a territory can require keeping other wolves away & howling is used by wolves to keep other wolves away -> howling is used by wolves to establish a territory