Complex sentence: In 1784, Bernardo Espinalt insisted that the urban expansion of Segorbe beyond the original medieval fortifications should be commenced which resulted the need to establish new walls beyond the original layout.
Split into simpler sentences: In 1784, Bernardo Espinalt insisted that the urban expansion of Segorbe beyond the original medieval fortifications should be started. This resulted in the need to establish new walls beyond the original layout.