Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: The family of a murdered mother have spoken of their fury after it was revealed that she tried to call 999 hours before she was killed but call handlers failed to alert police. Karen Catherall, 45, was viciously beaten and strangled to death by Darren Jeffreys, who she met only weeks earlier on dating site Plenty of Fish. The pair had been drinking at the pub before she returned to her home in Gwernaffield near Mold, Flintshire, North Wales, when Jeffreys, 47, followed and attacked in an alcohol-fuelled rage. Scroll down for video Karen Catherall, 45, (right) was brutally murdered by Darren Jefferys (left) who she met on a dating site just weeks before her death. He was jailed for a minimum of 17 and a half years in FebruaryKaren Catherall, 45, was beaten and strangled to death by Darren JefferysThey met weeks earlier on dating site Plenty of Fish before he killed herPolice revealed the mother-of-two tried to call 999 on night of her murderCall handler got no response and so the call was not connected to police 
 Question:'If they had got to her in time _ might still be alive.

Karen Catherall