"Scientists have long debated whether any other species can develop the ability to learn human language."

Those same scientists have long debated the goals of their field.

Historians have long debated the social, economic and political roles of southern classes.

Educators and parents have long debated the issue of when children should start kindergarten.

It also provided the elements for an argument that can be debated all winter long.

The source of the dust has been long debated.

Historians have long debated the exact meaning of these words.

The result of the fight has been long debated by the press and fans.

Historians have long debated the meaning and nature of the rebellion.

But historians have long debated what happened in that 1836 battle.