As you turn to head up into the valley, look for a house on the left surrounded by shady trees.
When you go into the valley, be on a lookout for a house with a lot of shady trees.
mnli hypothesis: When you go into the valley, be on a lookout for a house with a lot of shady trees. premise: As you turn to head up into the valley, look for a house on the left surrounded by shady trees.