sentence1: To ward off child molesters, the city of San Mateo, Calif., has proposed background checks and fingerprinting of Little League coaches, den mothers, and others who volunteer their time to children (never mind, as the Wall Street Journal reports, that less than 10 percent of all child molestations take place in an institutional setting; that most accused child molesters have no previous convictions; and that child abuse is down in the '90s).
sentence2: The city of San Mateo, is taking preemptive measures to ward off child molesters.