3 oil tankers, <b>of which there are hundreds</b>, pollute more air than all the cars in the UK.<br/><br/><br/><br/>Can we accept this, or does the relative clause in bold have no choice but to modify 3 oil tankers, not just oil tankers?<br/><br/><br/><br/>3 oil tankers, there are hundreds of which, pollute more air than all the cars in the UK.<br/><br/><br/>And is this acceptable albeit unusual? Why?<br/><br/><br/><br/><br/><br/>Thanks