CONCEPTS: forest, grow, mushroom, rot, trunk

GEN: mushrooms and mosses growing on a rotting trunk in the forest

CONCEPTS: leave, station, train

GEN: a train leaving station bound

CONCEPTS: cottage, nestle, tree

GEN: the cottage is nestled in the trees .

CONCEPTS: junction, train, travel

GEN:
The train is traveling form the city, and has arrived at the junction of several tracks.