A demonstrator attends a protest with her mouth covered by tape and face painted in the colors of the Venezuelan flag in Caracas, Venezuela, Sunday, March 2, 2014. Since mid-February, anti-government activists have been protesting high inflation, shortages of food stuffs and medicine, and violent crime in a nation with the world's largest proven oil reserves. (AP Photo/Rodrigo Abd)CARACAS, Venezuela (AP) — A leader of the Venezuelan opposition called Monday for citizens to begin organizing committees that could sustain the pressure that continuing street protests have placed on the socialist government of President Nicolas Maduro.