TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: How long no When is the oldest armed seal of Sigilium from?

SOLUTION: When is the oldest armed seal of Sigilium from?

PROBLEM: What was the philosophy no the huihui?

SOLUTION: What was huihui?

PROBLEM: Which species moves by swimming no sorry not swimming but by a darting motion?

SOLUTION:
Which species moves by a darting motion?