52nd Street (also known as 52nd Street–Lincoln Avenue) is a local station on the IRT Flushing Line of the New York City Subway. Located at the intersection of 52nd Street and Roosevelt Avenue in Woodside, Queens, it is served by the 7 train at all times.
This is about flushing toilets. 
The context talks about a subway and information to do with transportation, which has nothing to do with "flushing toilets" - therefore, my statement is definitely incorrect. I think the system had difficulty because it focuses too much on what is possible and not what is probable, or in this case, improbable and clearly not true. 
( z1 this :topic ( z2 flush :ARG1 ( z3 toilet ) ) )