Complex sentence: The building was originally built by J. H. Meedeniya Adigar, which he named "Rickman House", as the home of D. R. Wijewardena (the founder of the Lake House newspaper group), who married Meedeniya's eldest daughter Alice.
Split into simpler sentences: The building was originally built by J. H. Meedeniya Adigar, which he named "Rickman House". It was the home of D. R. Wijewardena (the founder of the Lake House newspaper group), who married Meedeniya's eldest daughter Alice.