TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: Many grevilleas have a propensity to interbreed freely , and extensive hybridisation and selection of horticulturally desirable attributes has led to the commercial release of many named cultivars .

SOLUTION: Many grevilleas interbreed freely , and some specially picked hybrids have been grown for sale .

PROBLEM: The Palace of Whitehall ( or Palace of White Hall ) at Westminster , Middlesex , was the main residence of the English monarchs from 1530 until 1698 , when most of its structures , except for Inigo Jones 's Banqueting House of 1622 , were destroyed by fire .

SOLUTION: The Palace of Whitehall was the main home of the English kings and queens in London , from 1530 until 1698 , when all except Inigo Jones 's 1622 Banqueting House was destroyed by fire .

PROBLEM: Masonry is the building of structures from individual units , which are often laid in and bound together by mortar ; the term " masonry " can also refer to the units themselves .

SOLUTION:
Masonry is the building of structures from individual units laid in and bound together by mortar .