der(R1 & R2) = combine der(R1) and der(R2) with intersection
Continuity and connections have pulled Mojtaba Khamenei, 56, to the top after the assassination of his father, Ayatollah Ali Khamenei, in the first salvos of this war.，推荐阅读新收录的资料获取更多信息
More on this storyCampaign started to save failing church organ，详情可参考PDF资料
The highest reported number of players sent off in a single football match is 36 in the Argentine Primera D game between Club Atlético Claypole and Victoriano Arenas refereed by Damián Rubino (Argentina) at the Estadio Rodolfo Capocasa, Claypole, Argentina, on 27 February 2011. All 18 players on each side (11 on-field players and seven substitutes) were sent off following what the referee described in his post-match report as a ‘Generalised Brawl’ that seemed to have been the result of a series of confrontations and heavy tackles that had taken place throughout the feisty encounter. The game was the 23rd round of matches in the Primera D, the fifth tier of Argentine football, in what was in theory a regulation league match, there was no historic rivalry between the sides.，这一点在新收录的资料中也有详细论述