CONCEPTS: battery, invention, know

GEN: how to know how long will last the battery of computer and invention

CONCEPTS: iron, ski, wax

GEN: The man pours wax and we get instructions before he irons the wax on the ski.

CONCEPTS: paint, pink, sky

GEN: a palette of pinks and blues paint the morning sky behind country .

CONCEPTS: city, head, road

GEN:
a skier heads along road as a major winter storm blasts a city .