Sentence:  In English there is no grammatical device to differentiate predicational judgments from nonpredicational descriptions. This distinction does cast a shadow on the grammatical sphere to some extent, but recognition of it must generally be made in semantic terms. It is maintained here that in Japanese, on the other hand, the distinction is grammatically realized through the use of the two <WSD>particles</WSD> <u>wa</u> and <u>ga</u>. 
Meaning of the word marked with <WSD> tags:  A word that has a particular grammatical function but does not obviously belong to any particular part of speech, such as the word "to" in English infinitives or "O" as a vocative particle.