This is the 85th most frequent Lithuanian word.
tą
The Lithuanian word "tą" means "that" (used as a singular accusative form of "tas," referring to a specific object or thing).
Here, 'tą' singles out 'knyga' (book), indicating which specific book was taken.
Ji paėmė tą knygą nuo stalo.
She took that book from the table.
In this instance, 'tą' identifies 'restoranas' (restaurant) as the specific place to which the action refers.
Mes einame į tą restoraną pavakarieniauti.
We are going to that restaurant for dinner.
In this sentence, 'tą' is a demonstrative pronoun, specifying 'filmas' (movie) as a particular one previously known or mentioned.