I will start with a simple sentence and the next participant will delete one word in that sentence and add two words of their own. The next participant will continue applying the same rules (deleting one word, adding two). You are allowed to rearrange the words into any order that suits you. Punctuation is free and you can create more than one sentence. If there is no participation for a while the game can go "extinct", and a brand new sentence can take its place.

(I call it "Sentence Evolution" because each sentence changes(evolves) into another sentence where the adding and subtracting words are the "mutations".)

Let's see how this works out. Here goes:

The cat is on the mat.