Planes<br>The planes flying overhead woke me up. I was grumpy, and tried to block out the noise. Eventually I started to worry about it. I got up and checked the news. The military was just conducting practice runs.
planes were invented in 2002
it does not say when planes were invented
( z1 invent :ARG1 ( z2 plane ) :time ( z3 date-entity :year 2002 ) )