in 1948 eckmann, who had already been promoted to extraordinary professor at lausanne, was offered a full professorship back at the eidgenössische technische hochschule zürich.

Write the above sentence using proper case.
In 1948 Eckmann, who had already been promoted to Extraordinary Professor at Lausanne, was offered a full Professorship back at the Eidgenössische Technische Hochschule Zürich.