Input:
Are these paraphrases?
The position of opposition leader throughout the early twentieth century was essentially informal , with formal recognition only being granted in the nineteenth century .
The position of Leader of the Opposition was essentially informal throughout the early twentieth century , with formal recognition only being granted in the nineteenth century .
Output:
[yes]

Input:
Are these paraphrases?
An important advantage ( projected by Carr ) was that '' if Soviet Russia had eventually to fight Hitler , the Western Powers would already be involved . ''
An important advantage ( projected by Carr ) was that '' if Soviet Russia had to fight Hitler eventually , the Western powers would already be involved .
Output:
[yes]

Input:
Are these paraphrases?
With the decline of Dutch power , other colonial powers , the Portuguese , British , and Christian organizations , gained influence .
With the decline of Portuguese power other colonial powers -- the Dutch and British and Christian organisations -- gained influence .
Output:
[no]