Complex sentence: She made an emigrant voyage to Canada under the command of Peter Roche, she sailed from Cork, Ireland on 22 April 1825 and arrived at Quebec on 22 July 1825.
Split into simpler sentences: She made an emigrant voyage to Canada under the command of Peter Roche. She sailed from Cork, Ireland on 22 April 1825 and arrived at Quebec on 22 July 1825.