id	keyword
ape-3815	note
ape-3815	ocean
ape-3815	era
ape-3815	sea
ape-3815	human
ape-3815	economics
ape-3815	resources
ape-3815	marine
ape-3815	mankind
ape-3815	trade
ape-3815	transportation
ape-3815	advances
ape-3815	world
ape-3815	dutch