Sentence:  When the <small>[lost property]</small> office first opened, the most frequently lost items were <WSD>umbrellas</WSD>. Every white-collar professional carried one, but despite, or because of, that they were easily forgotten about. [...] In the 1930s, a quarter of a million <WSD>umbrellas</WSD> a year came into the office. Now it's more like 10,000. 
Meaning of the word marked with <WSD> tags:  Cloth-covered frame used for protection against rain or sun.