SCHEMA:
CREATE TABLE table_name_99 (hs_principal VARCHAR, wr_principal VARCHAR, ms_principal VARCHAR)
USER:
Who is the h.s. principal with Dave Lovering as w.r. principal and Marty Pizur as m.s. principal?

QUERY:
SELECT hs_principal FROM table_name_99 WHERE wr_principal = "dave lovering" AND ms_principal = "marty pizur"