On grammatical class:
- start discursive (metalinguistic) bridi.
- mathematical expression (mex) operator precedence (discursive).
- x1 is the selma'o "SEI".
- x1 is metalinguistic with respect to the expression by x2 of text x3 for audience x4 via medium x5 .
- x1 is an adverb meaning x2 in language x3