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: K-9 units entered the sewer system on Friday as law enforcement followed leads that the escaped murderers could have gone underground following their extraordinary prison break almost a week ago. New York State K-9 officer Matt Ross and his German shepherd Buck sloshed through human waste feet under the streets of Dannemora, New York. But officers were tight-lipped about exactly what they were looking for as the hunt for escaped killers, David Sweat and Richard Matt, entered the seventh day. Buck was underground for some five minutes below Emmons Street which runs alongside the maximum security Clinton Correctional Facility which the two men broke out of a week ago.Residents in Cadyville, New York were told to stay inside and lock windows and doors after several reported sightings of the prisonersThe hunt for convicted killers Richard Matt and David Sweat continued in upstate New York on Friday800 law enforcement officers were now hunting for the escapeesThey broke out of Clinton Correctional Facility using power tools in the early hours of SaturdayState Route 374, the main road leading into Dannemora, remained closed for a second day on Friday, as does the local school district 
 Question:The hundreds of state, federal and local officers conducting the search spent Thursday slogging through a swampy patch of woods just east of _, three miles from the prison, after investigators had received tips that the convicts were in the area.

Dannemora