Complex sentence: However, when Bart receives the check, it is endorsed with a stamp ("Cayman Islands Off-Shore Holding Corporation") instead of a signature; dismayed, Bart takes the check back to the bank so that they can force Krusty to sign it.
Split into simpler sentences: However, when Bart receives the check, it is endorsed with a stamp ("Cayman Islands Off-Shore Holding Corporation") instead of a signature. Dismayed, Bart takes the check back to the bank so that they can force Krusty to sign it.