Complex sentence: The ambassador from Baekje was received by the emperor, who entertained him; and Nimmyō charged Ono no Takamura to prepare a letter which was to be presented at the Baekje court.
Split into simpler sentences: The ambassador from Baekje was received by the emperor, who entertained him. Emperor Tenmyō charged Ono no Takamura to prepare a letter which was to be presented at the Baekje court.