Definition: In this task, you are given concept set (with 3 to 5 concepts) that contain mentions of names of people, places, activities, or things. These concept sets reflect reasonable concept co-occurrences in everyday situations. All concepts given as input are separated by "#". Your job is to generate a sentence describing a day-to-day scene using all concepts from a given concept set.

Positive Example 1 -
Input: mountain#ski#skier
Output: Skier skis down the mountain

Positive Example 2 -
Input: call#character#contain#wallpaper
Output: queen of wallpaper containing a portrait called film character .

Negative Example 1 -
Input: monarch#present#trophy#win
Output: A huge commercial airplane comes down the runway.

Negative Example 2 -
Input: hang#stall#wall
Output: military commander entering into a city on the railway

Now complete the following example -
Input: niche#organism#role
Output: 

niche all organisms have specific roles in an ecosystem
niche the special role an organism plays within a habitat .
niche the role of an organisms within its environment that is specific .