(S (S (NP (BASENP (NNS Photojournalists)) (CC and) (BASENP (NN camera) (NNS operators))) (VP (VBP have) (VP (VBN been) (NP (BASENP (DT some)) (PP (IN of) (NP (BASENP (DT the) (DT the) (ADJP (RBS most) (JJ at-risk))) (PP (IN during) (NP (BASENP (DT the) (JJ Arab) (NNS uprisings)) (PP (IN in) (BASENP (NNP Tunisia) (CC and) (NNP Libya))))))))))) (PERIOD .))