################################
### Propose Turn operator if sound is not from front
################################
sp {chase*propose*turn
   (state <s> ^name chase
              ^sound-direction {<< left right >> <direction>})
   -->
   (<s> ^operator <o> + =)
   (<o> ^name turn
        ^actions.rotate.direction <direction>)}

################################
### Propose Turn operator if sound is from the back
################################
sp {chase*propose*backward
   (state <s> ^name chase
              ^sound-direction backward)
   -->
   (<s> ^operator <o> +)
   (<o> ^name turn
        ^actions.rotate.direction left)}
