At the time, neither "USA Today" nor "The Observer" was able to verify which of the sixty-plus candidates it was.
It says that they could not verify it
( z1 say :ARG0 ( z2 it ) :ARG1 ( z3 possible :polarity - :ARG1 ( z4 verify :ARG0 ( z5 they ) :ARG1 z2 ) ) )