National environmental groups have a complicated history with natural gas.
Finding the right candidate will be a challenge, given the division's complicated history.
The organization has several predecessor organizations and a complicated history.
The organ has a complicated history and was restored in 1997.
The concept of relation has a long and complicated history in philosophy.
Although the surviving school building as of much later date, it has a fairly complicated history.
But the ballet has had a complicated history ever since.
She may have had a long and complicated history before that.
The fabric patterns, by the way, have a complicated history of their own.
The site on which it was built has a complicated history.
