TOKYO - MS&AD Insurance Group Holdings Inc says it has agreed to buy U.K. rival Amlin PLC for 3.47 billion pounds ($5.34 billion), in the fourth major international deal in as many months by Japanese insurers expanding overseas.
Take context from the input text and decide on the accurate relationship between 'Amlin' and 'Insurance' from the options provided.
Options: distribution format, industry, chairperson, employer