entity_id,period_id,confidence,rationale,source_id,review_status ENT_ORTH_ALEXEI_TSAREVICH,PER_MODERN_ORTHODOX,high,"Heir to the Russian throne (1904-1918), son of Nicholas II; executed at Yekaterinburg and glorified with his family as a passion-bearer in 2000.",SRC_SYNAXARION,reviewed