A question about 并于

Posted by ikagi March 24, 2012 in the Group General Discussion .

Can someone please explain the use of the word 并于 in the sentence:

Pablo和来自阿根廷的Elsa相恋已7年有余，并于一年前在巴塞罗那结婚.

Why in this sentence is there no 了 added after 结婚?

Updating ...