Simplify the following text for a Grade 8 native English-speaking person.
Original: Southern University entered the ranks in 1934 , followed by Arkansas AM&N ( now University of Arkansas-Pine Bluff ) in 1936 and Texas Southern University in 1954 .
Simplified: Southern University entered the league in 1934 . Arkansas AM&N entered in 1936 and Texas Southern University in 1954 .