<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.chelsea wameambiwa kuwa ni lazma walipe pauni milioni 30 ikiwa wanataka beki mjerumani mats hummels, 30, mwezi januari.  <response>: chelsea have been told they must pay 30m if they want to sign bayern munichs germany centre-back mats hummels, 30, in january. 