Sentence:  We will show that every closed 3-manifold has a <WSD>foliation</WSD> of codimension one. In 1952, G. Reeb published his construction of a <WSD>foliation</WSD> of the 3-sphere. About twelve years later, W. Lickorish [123] exhibited <WSD>foliations</WSD> of codimension one on every closed, orientable 3-manifold. 
Meaning of the word marked with <WSD> tags:  A set of submanifolds of a given manifold, each of which is of lower dimension than it, but which, taken together, are coextensive with it.