In particular, REASON is annotated only on LUs inherently indicating volitional causation, either because a subcategorization frame making the agent of the action explicit exists, as with The rain forced me to go, or simply because the LU cannot describe a non-volitional CAU-SATION, as is the case of the French connective puisque (since) (Degand and Pander Maat, 2003).
a volitional cause expressed using a LU not implying volition per se, as in I left because of the rain is considered a case of CAUSATION, differently from the discourse annotation tradition (Degand and Pander Maat, 2003).