TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: The species most commonly referred to as " pigeon " is the species known by scientists as the rock dove , one subspecies of which , the domestic pigeon , is common in many cities as the feral pigeon .

SOLUTION: The feral domestic pigeon is often called the " rock dove " : it is common in many cities .

PROBLEM: The Federation of Australia was the process by which the six separate British self-governing colonies of Queensland , New South Wales , Victoria , Tasmania , South Australia , and Western Australia agreed to unite and form the Commonwealth of Australia , establishing a system of federalism in Australia .

SOLUTION: The federation of Australia was the way that the six separate British colonies of New South Wales , Queensland , South Australia , Tasmania , Victoria and Western Australia joined together to become one country .

PROBLEM: The single transferable vote ( STV ) is a voting system designed to achieve proportional representation through ranked voting in multi-seat organizations or constituencies ( voting districts ) .

SOLUTION:
Single transferable vote ( STV for short ) is a type of voting system .