Determine if the group of words is a sentence or run-on .although i was in last place , i ran through the finish line as if i won the race .

- Sentence.

Explanation:

A sentence is described as the group of words offering a complete thought while a run-on sentence is described as a sentence that incorrectly joins two or more independent clauses without any punctuation marks or conjunction.

As per the question, the given group of words exemplify a sentence(complex sentence) that offers a complete thought. It consists appropriately of a subordinate clause 'Although I was in last place' along with the principle clause 'I ran through the finish line as if I won the race' joined with adequate punctuation marks (comma) and subordinating conjunction 'although'. Thus, it would be categorized as a 'sentence'.

a, a knight

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.