And this is a town that everybody agrees, law enforcement, Border Patrol, residents on both sides, is a staging area of illegal drugs and illegal aliens.
Illegal aliens are bringing drugs into the town.
The article states that the town has problems with illegal drugs and illegal aliens. The illegal aliens might or might not be bringing drugs into the town, we don't have enough information to know. I think the system is confused because I used words from the article and implied a meaning from them.
( z1 bring :ARG0 ( z2 person :ARG1-of ( z3 legal :polarity - ) :ARG1-of ( z4 alien ) ) :ARG1 ( z5 drug ) :ARG2 ( z6 town ) )