"Getting your mind prepared to run four hours is a big undertaking."

Which was a big undertaking that would take three years to achieve.

It's a big undertaking and it has gotten to be too much.

"That is a big undertaking - bigger than moving an apartment," he said.

That's a big undertaking and I'm saving it for last.

I gather it was rather a big undertaking for them to take on this place.

And this is the biggest undertaking we've ever been offered.

Set the bar low at first, because often what seemed easy will turn out to be a big undertaking.

Getting a new bill through parliament would be a much bigger undertaking than simply changing the rules.

The new album is our biggest undertaking yet, and we believe it will reach a lot of people.