Complex sentence: Leixões was the second club to suffer relegation to Liga de Honra, the club's impending drop occurred on 2nd May, in the penultimate round where they lost 1--0 to Olhanense, after three years in Portuguese Liga.
Split into simpler sentences: Leixões was the second club to suffer relegation to Liga de Honra. The club's impending drop occurred on 02 May, penultimate round when he lost out 1--0 with Olhanense, after three years in Portuguese Liga.