instruction:
This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.
question:
both were extraordinarily large and demanding tasks .
answer:
both tasks were extensive and challenging .

question:
'' the americans and the british have expertise which we need , from their own exploitation of the alaskan fields .
answer:
'' the americans and the british have the knowledge we need to get them on their fields in alaska .

question:
his recent book , the god delusion , has sold over one million copies worldwide .
answer:
the copies of his last book , '' god is a mirage ... ... '' have all over the world over a million years .