Remove duplicate text from multiple strings

Remove duplicate text from multiple strings

I have:
a = "This is Product A with property B and propery C. Buy it now!"
b = "This is Product B with property X and propery Y. Buy it now!"
c = "This is Product C having no properties. Buy it now!"
I'm looking for an algorithm that can do:
> magic(a, b, c)
=> ['A with property B and propery C',
'B with property X and propery Y',
'C having no properties']
I have to find for duplicates in 1000+ texts. Super performance isn't a
must, but would be nice.