Sentence:  In some <WSD>flat stores</WSD> a small trough or day silo is located on the perimeter inside the <WSD>flat store</WSD> which is also accessed from the outside of the <WSD>flat store</WSD>. 
Meaning of the word marked with <WSD> tags:  A storage facility in which the material stored is simply piled on a floor (as opposed to a bin or silo).