Refer to the input text as context and select the correct relationship between 'IP Group' and 'LONDON' from the available options.
Options: platform, stock exchange, industry, headquarters location

LONDON (ShareCast) - (ShareCast News) - IP Group (LSE: IPO.L - news ) has made a £50.3m fair value gain in the value of its stake in portfolio company Oxford Nanopore Technologies after the Oxford University spin-out venture raised £70m in a new financing round.
headquarters location