Q: from april to june of this year, water hyacinths accounted for 80 percent of the 15,000 tons of floating rubbish collected by guangzhou city.

A: From April to June of this year, water hyacinths accounted for 80 percent of the 15,000 tons of floating rubbish collected by Guangzhou city.
++++++++
Q: orgasms and sex students

A: Orgasms and sex students
++++++++
Q: the sephardic jews may also be said to have paid more heed to them than the gentile masses around them.

A:
The Sephardic Jews may also be said to have paid more heed to them than the Gentile masses around them.
++++++++