actor1: Protesters (Nigeria)
actor2: Police Forces of Nigeria (1999-2015)
notes: About 200 policemen blocked the main entrance of the University of Calabar, preventing members and officials of the Academic Staff Union of Universities (ASUU) Calabar branch from embarking on a planned street rally.
target_text: actor1: Protesters (Nigeria), actor2: Police Forces of Nigeria (1999-2015)