The construction with -la does not only function as a demonstrative, but its functions lie in between those of a demonstrative and those of a definite article.
It not only follows nouns but can also be postposed to other word classes, such as adverbial constructions: wala, kom sa-la 'voilà, like this' (Ehrhart 1993: 123).
Source: Ehrhart 1993: 121f.
Source: Ehrhart 1993: 122