A man with curly hair and glasses tries to tug a large rope on a boat to no avail .
There is a very good chance that a sailor tries to tug a large rope on a boat to no avail .
There is a very good chance that a sailor tries to tug a large rope on a boat to no avail .
It is impossible that a sailor tries to tug a large rope on a boat to no avail .
a sailor tries to tug a large rope on a boat to no avail .