A second portion is exposed to a universal allergy such as pokeweed to serve as a positive control .
A second portion is exposed to a positive allergen , such as Pokeweed , to serve as a universal control .

Are these two sentences paraphrases of each other?
no

In Australia , Narara Valley High School in New South Wales and Nossal High School in Victoria taught the course in her 2012 school year .
In Australia , Narara Valley High School in New South Wales and Nossal High School in Victoria taught the course in their 2012 school year .

Are these two sentences paraphrases of each other?
yes

The 2014 series involved eight celebrities including goalkeeper Neville Southall , weather presenter Sam Evans , singer Ian Watkins and '' Big Brother '' winner Behnaz Akhgar .
The 2014 series comprised eight celebrities , including goalkeeper Neville Southall , weather moderator Behnaz Akhgar , singer Ian Watkins , and '' Big Brother '' winner Sam Evans .

Are these two sentences paraphrases of each other?
no

Saghar has written over 2,000 songs for Pakistani singers and music directors for many films , radio and TV .
For many singers and music directors , Saghar has written more than 2,000 songs for Pakistani films , radio and TV .

Are these two sentences paraphrases of each other?
no