Complex sentence: Cooke Aquaculture Ltd. has chosen Shelburne as site for a substantial increase in their salmon farming operation there, which would increase the number of farms in the area to eight or more and would include the construction of a fish processing plant employing 350 people.
Split into simpler sentences: Cooke Aquaculture Ltd. has chosen Shelburne as site for a substantial increase in their salmon farming operation. Plans are to increase the number of farms in the area to eight or more and construct a fish processing plant employing 350 people.