SELECT centennial FROM table_15977768_1 WHERE akimel_a_al_the_name_is_tohono_oodham_for_children_of_the_river = "1992"
Sebutkan Centennial untuk 1992 Akimel
CREATE TABLE table_15977768_1 (centennial VARCHAR, akimel_a_al_the_name_is_tohono_oodham_for_children_of_the_river VARCHAR)