He attempted to call the spirits of the dead using an ancient ritual.

He tried to call a spirit using an ancient ritual.

This polynomial is represented in descending powers.

He was demoted.

He was demoted because of his poor performance.

Due to the economic crisis, the company decided to reduce everyone's salary.

His salary was reduced because the company's financial situation worsened.

The Adige is the second longest river in Italy.

The Congo River is the largest river in Africa.

The Danube is one of the longest rivers in Europe.