Complex sentence: However during this period, the island's role in science grew, first in weather research the Canadian government expanded the collection of weather data originally started by the rescue station into a full meteorological station operated by Environment Canada and Department of Fisheries and Oceans.
Split into simpler sentences: However during this period, the island's role in science grew, first in weather research. The Canadian government expanded the collection of weather data originally started by the rescue station into a full meteorological station operated by Environment Canada and Department of Fisheries and Oceans.