Complex sentence: Fine Gael records its biggest election victory, coming within five seats of Fianna Fáil; at other times Fianna Fáil had been twice as big as Fine Gael.
Split into simpler sentences: Fine Gael records its biggest election victory, coming within five seats of Fianna Fáil. At other times Fioanna Fáil was often twice as big as Fine Gael.