Complex sentence: Christianity (as a religion of the so-called white) was first preached in Nigeria at Badagry in 1842 by Rev Thomas Birch Freeman and he celebrated the first Christmas in Nigeria the following year.
Split into simpler sentences: Christianity (as a religion of the so-called white) was first preached in Nigeria at Badagry in 1842 by Rev Thomas Birch Freeman. He celebrated the first Christmas in Nigeria the following year.