[lemma=path] [word=uses] [lemma=multiple] [□]
[lemma=path] [word=uses] [lemma=multiple] [□ | □]
[lemma=path] [word=uses] [lemma=multiple] [!□]
While related work on paths uses multiple trees [ YOUNG ] , there is no need to keep track of multiple trees when a root node may have a variable number of children , and thus can hold together all of the path trees .