We provisionally recognize three main types of σ1, and discuss some properties of each of these: [a] additional participants involved in, or associated with the SoA: Beneficiary, Company. [b] specifications of the manner in which or the means by which the SoA [state of affairs] is effected: Instrument, Manner, Speed; Quality. [c] spatial orientation of the SoA: Direction, Source; Path.
- Dik (1989), a pag.195