Simplify the following text for a Grade 4 native English-speaking person.
Original: ( Winners from 1946 to 1977 received the Walter A. Brown Trophy ) The NBA Finals has been played at the conclusion of every NBA and BAA season in history , the first being held in 1947 .
Simplified: This event has been played at the end of every NBA and BAA season in history . The first was held in 1947 .