Complex sentence: The House of Rasheed (Arabic: آل رشيد Āl Rashid or Alrasheed) were a historic dynasty of the Arabian Peninsula from Shammar tribe, and the most formidable enemies of the House of Saud in Nejd.
Split into simpler sentences: The House of Rasheed (Arabic: آل رشيد Āl Rashid or Alrasheed) were a historic Shammar dynasty on the Arabian Peninsula. They were the most formidable enemies of the House of Saud in Nejd.