the pro-union parties responded to the electoral success of the snp by creating a commission to examine the case for devolving additional powers while excluding scottish independence as an option, though the then leader of the scottish lab our party, wendy alexander, indicated that lab our would support calls for independence to be placed before the people in a referendum in the hope that a vote to reject independence would settle the constitutional debate for a generation.

How would the previous sentence be correctly capitalized?
The pro-union parties responded to the electoral success of the SNP by creating a Commission to examine the case for devolving additional powers while excluding Scottish independence as an option, though the then leader of the Scottish Lab our Party, Wendy Alexander, indicated that Lab our would support calls for independence to be placed before the people in a referendum in the hope that a vote to reject independence would settle the constitutional debate for a generation.