    Sentence iSo,'whai's with ghe BLS andthe random  assassination of police? Is it a'conspiracy?    Sentence 2 Thee is. graph with nwo nodes marked start arid  gid. What are'the minimuni umber af riades av hich a  police check, should :be- constructed, 80° a5 19 prevent a  cximninal trom going from stare 10 énd?: