γραμματική ἐστιν ἐμπειρία τῶν παρὰ ποιηταῖς τε καὶ συγγραφεῦσιν ὡς ἐπὶ τὸ πολὺ λεγομένων → grammar is a practical knowledge of the usage of poets and writers of prose
P. and V. ἐξ οὗ, ἀφ' οὗ, ἐξ ὅτου, V. ἀφ' οὗπερ, ἐξ οὗτε, ἐπεί, Ar. and V. ἐξ οὗπερ, P. ἐπειδήπερ; see since.