Sentence:  ... Marmaduke Wetherell was hired by the "Daily Mail" newspaper to lead a search for the lair of the <WSD>Loch</WSD> Ness Monster. ... To everyone's surprise, within a few days of the start of his search, Wetherell came across a huge, four-toed footprint along the shoreline of the <WSD>loch</WSD>. This was just the sort of sensational story the newspaper was hoping for. 
Meaning of the word marked with <WSD> tags:  A lake.