(Automobiles, boats, trains have smooth surfaces, reducing friction, this is called "streamlining").
(this; is called; streamlining) (Automobiles, boats, trains; have; smooth surfaces) Context(Automobiles , boats , trains have,List([1, 32))):(Automobiles, boats, trains; have smooth surfaces reducing; friction)
Automobiles , boats , trains have,List([1, 32))
this Automobiles, boats, trains Automobiles, boats, trains
is called have have smooth surfaces reducing
streamlining
smooth surfaces
friction