Complex sentence: Founded by Juan Bosch in 1973, the PLD originally was considerably to the left of Bosch's original party, the Dominican Revolutionary Partyran for president as the party's candidate several times, but did not win.
Split into simpler sentences: Founded by Juan Bosch in 1973, the PLD originally was considerably to the left of Bosch's original party, the Dominican Revolutionary Party. Bosch ran for president as the party's candidate several times, but did not win.