ISTANBUL - An Istanbul court sentenced on Monday the chief suspect in the 2007 assassination of Armenian journalist Hrant Dink to nearly 23 years in prison, state-run Anatolian news agency reported.The suspect, Ogun Samast, was 17 and unemployed when the killing took place. Dink had angered nationalists with articles referring to a Turkish "genocide" of Armenians in 1915.Dink was the editor of the bilingual Turkish-Armenian weekly Agos and Turkey's best known Armenian voice abroad. He was shot in broad daylight as he left his office in Istanbul.