Now another phenomenon of this tense period in American life began to manifest itself.

I glanced up then, but the overhead phenomenon had not yet begun.

A new phenomenon then began: emigration of the working population.

I gather the phenomenon only began when she met you?

The phenomenon of Sophie has begun to draw media attention.

The phenomenon began at the beginning of the 20th century.

In a moment, the curious phenomenon of warmth began to repeat itself.

The phenomenon began in the mid 1950s and continues today.

"The phenomenon would begin to collapse in the past, and work its way forward to our time."

The growing phenomenon of children at war has begun to attract considerable international attention.