Original sentence: On May 19 1991, Croatian authorities held a referendum on independence from Yugoslavia.On occasion, the JNA sided with the local Croat Serb forces, intervening against the Croatian police units
Edited sentence: ) from Yugoslavia.On May 19 1991, Croatian authorities held a referendum on "razdruženje" (not "secession".On occasion, the JNA sided with the local Croat Serb forces, intervening against the Croatian paramilitary police units and preventing it in its action against Serb terrorist activities