rtokens: The boards read : " Air Bag Safety : Everyone Buckled , Kids in Back . "
pos: DT JJ NN IN DT NN VBZ NN NNS VBN IN NNS WDT VBD VBG IN DT IN DT NN POS JJS JJ NNS IN DT NNP NNP NN , VBG NNP NNP IN DT NNP NNP , NNP CD CC CD IN DT NNP CC NNP CD IN NNP .
tokens: The first portion of the campaign involves pickup trucks equipped with billboards that were driving along some of the nation 's busiest interstate highways during the Labor Day weekend , including Interstate 95 on the East Coast , Interstates 80 and 90 in the Midwest and Interstate 5 in California .
ltokens: Since 1993 , 24 children have been killed by the explosive force of automotive air bags , which inflate at speeds up to 200 miles per hour .