su'umdu fu'ivla

x1 is the predicate abstraction described by text x2, and is of type x3

Brivla form of su'u. "se su'umdu" be used to talk about NU-clauses in general. See nundumu, du'umdu, zilkai, zilki'i, bridi, astrato

In notes:

x1 (li'i) is the subjective conscious experience of x2 (nu or ka-of-x3), as experienced by x3
x1 (ni) is a quantity
x1 (si'o) is an idea/concept/thought about x2 (object/abstract) by thinker x3.
x1 (mass) is the object type of argument object x2, as defined by property x3 (ka)