CREATE TABLE activity (actid DECIMAL, activity_name TEXT)
CREATE TABLE faculty (facid DECIMAL, lname TEXT, fname TEXT, rank TEXT, sex TEXT, phone DECIMAL, room TEXT, building TEXT)
CREATE TABLE faculty_participates_in (facid DECIMAL, actid DECIMAL)
CREATE TABLE participates_in (stuid DECIMAL, actid DECIMAL)
CREATE TABLE student (stuid DECIMAL, lname TEXT, fname TEXT, age DECIMAL, sex TEXT, major DECIMAL, advisor DECIMAL, city_code TEXT)

What is the first and last name of the student participating in the most activities?
SELECT T1.fname, T1.lname FROM student AS T1 JOIN participates_in AS T2 ON T1.stuid = T2.stuid GROUP BY T1.stuid ORDER BY COUNT(*) DESC LIMIT 1
SELECT "T1"."fname", "T1"."lname" FROM "student" AS "T1" JOIN "participates_in" AS "T2" ON "T1"."stuid" = "T2"."stuid" GROUP BY "T1"."stuid" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1