Complex sentence: The cultivar'Scampstoniensis', the Scampston Elm, originated at Scampston Hall, Yorkshire, England, before 1810, and was considered "probably a form of" Ulmus × hollandica "" by Green Green, P. S. (1964).
Split into simpler sentences: The cultivar'Scampstoniensis', the Scampston Elm, originated at Scampston Hall, Yorkshire, England, before 1810. Considered "probably a form of" Ulmus × hollandica "" by Green Green, P. S. (1964).