<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.tarehe 18 agosti ya mwaka 1977, biko alitiwa nguvuni na polisi kwa thuhuma ya ugaidi kifungu namba 83 cha 1967 cha nchini afrika kusini.  <response>: on 18 august, 1977, biko was arrested at a police roadblock under the terrorism act no 83 of 1967. 