Federal health officials have been trying to increase and diversify the supply of seasonal flu vaccines to avoid a repeat of the shortage in 2004 , when Chiron 's factory in Liverpool , England , was suddenly closed by British regulators because of sanitary problems , depriving the United States of about half its expected supply .
England /location/location/contains Liverpool
NNP NN NNS VBP VBN VBG TO VB CC VB DT NN IN JJ NN NNS TO VB DT NN IN DT NN IN CD , WRB NNP POS NN IN NNP , NNP , VBD RB VBN IN JJ NNS IN IN JJ NNS , VBG DT NNP NNPS IN IN PDT PRP$ VBN NN .
England
LOCATION
Liverpool
LOCATION
/location/location/contains