Nichols, 49, was convicted in the April 19, 1995, bombing of the Alfred P. Murrah Federal Building in Oklahoma City.
Nichols was born in June.
It's never mentioned what month he was born in, so we don't know. It's difficult because April is mentioned, so the system assumes anything except April is wrong.
( z1 bear :ARG1 ( z2 person :name ( z3 name :op "Nichols" ) ) :time ( z4 date-entity :month 6 ) )