Complex sentence: Jack Monroe (born 1988, Southend-on-Sea) is a writer, journalist and activist best known for their campaigns surrounding poverty issues, particularly on hunger relief, and for publishing a blog and several books of "austerity recipes".
Split into simpler sentences: Jack Monroe (born 1988, Southend-on-Sea) is a writer, journalist and activist. Monroe is known for activism surrounding poverty issues, particularly on hunger relief, and has published a blog and several books of "austerity recipes".