Sentence examples similar to the first stage was problematic from inspiring English sources

The first stage was childhood.

The first stage is called proestrus.

The first stage is gratitude.

The first stage is a fission explosion.

The first stage is ridicule.

The first stage is always metal.

The second stage was Beatrice.

The second stage was Virgil.

The third stage was expurgated.

The third stage is going to be problematic, since it is bargaining -- and Trump is a notoriously tough bargainer.

But the second stage is more difficult.