Mr. Olsen paid $20 million for the space trip, but says that in the future space travel will likely become as routine as air travel is today.
Olsen's space trip was prohibitively expensive for the average American.
Common sense makes this statement definitely correct, but the system does not account for common sense. 
( z1 expensive :domain ( z2 trip :ARG0 ( z3 person :name ( z4 name :op "Olsen" ) ) :ARG1 ( z5 space ) ) :ARG3-of ( z6 prohibitive :ARG1 ( z7 person :mod ( z8 country :name ( z9 name :op "America" ) ) :ARG1-of ( z10 average ) ) ) )