An author's collaboration with an authors' editor begins after a manuscript has been drafted.

Their collaboration began as an experiment and then developed into an exclusive partnership.

Their collaboration began when the entire year group - 13 artists with very different individual practices - decided to work together on a single artwork.

Thus began a rich collaboration between the two that has lasted nearly five decades.

A close collaboration began, which continues to this day.

Thus began a long professional collaboration and friendship between the two.

Since this collaboration began he has been featured in three magazines.

Their collaboration began with her dissertation on children's conservation and continued for almost 50 years.

The dolphins were not trained for this behavior; the collaboration began before 1847.

They decided on marrying at the Vermont farmhouse, where their collaboration began.