vel cki lujvo

x₁ is an explanation of x₂ (event/state/property) to x₃ by x₄.

In notes:

ciksi: x₁ (person) explains x₂ (event/state/property) to x₃ with explanation x₄ (du'u).
bityvelcki: x₁ is a theory about x2 (event/state/property) to x₃ by x₄