Complex sentence: In some aircraft, pitch-control surfaces are in the front, ahead of the wing; in a two-surface aircraft, this type of configuration is called a canard (the French word for duck) or a tandem wing.
Split into simpler sentences: In some aircraft, pitch-control surfaces are in the front, ahead of the wing. In a two-surface aircraft this type of configuration is called a canard (the French word for duck) or a tandem wing.