Oil prices, notoriously vulnerable to political events, spiked as high as $40 a barrel during the Gulf War in 1991.
Wars will affect oil prices in the future.
( z1 affect :ARG0 ( z2 war ) :ARG1 ( z3 thing :ARG2-of ( z4 price :ARG1 ( z5 oil ) ) ) :time ( z6 future ) )