In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Portland stone is hard enough to resist weathering but soft enough to be worked ( cut and carved ) by stonemasons .
The degree of cementation in Portland stone is such that the stone is sufficiently well cemented to allow it to resist weathering , but not so well cemented that it ca n't be readily worked ( cut and carved ) by masons .

Removing old , unripe , damaged and broken seeds , and cleanliness also keeps down the spread of the pathogen .
Sanitary practices including , removing old and unripe seeds , exclusion of damaged and broken seeds , and overall cleanliness assist in minimizing the colonization and spread of the pathogen .

The Monterey International Pop Music Festival took place from June 16 to June 18 , 1967 .
The Monterey International Pop Music Festival was a three-day concert event held June 16 to June 18 , 1967 , at the Monterey County Fairgrounds in Monterey , California .