If there are two jellyfish, each one traveling the opposite direction as the other.
return jellyfish ;return number of  #1 ;return if  #2 is equal to  two ;return direction traveling in  of #1 ;return if  #4 are opposite ;return if  both  #3 and #5 are true
['select', 'aggregate', 'boolean', 'project', 'boolean', 'boolean']