CONCEPTS: mountain, train, travel

GEN: A train traveling on train tracks on a mountain.

CONCEPTS: circle, derive, equation

GEN: the equation of a circle is derived from its radius .

CONCEPTS: day, fountain, relax

GEN: people relaxing at the terrace and lake with fountains on a warm summers day

CONCEPTS: pair, scissor, tape

GEN:
The pair of scissors is on the fabric next to measuring tape.