Question: The Oklahoma City bombing was a domestic terrorist truck bombing on the Alfred P. Murrah Federal Building in downtown Oklahoma City, Oklahoma, United States on which date, Terry Lynn Nichols, is an American who was convicted of being an accomplice in the Oklahoma City bombing?
Sentence (from "Oklahoma City bombing conspiracy theories"): Some of these theories focus on the possibility of additional, unindicted, co-conspirators or additional explosives planted inside the Murrah Federal building.
Relevant evidence: No