 Complete the following phrase:  Alexios Mosele , or MuseleMousele Greek: Μουσηλέ, was a Byzantine admiral droungarios tou ploimou in the early reign of Emperor Romanos I Lekapenos r. 920944. He was killed in 921, leading a detachment of imperial marines along with the imperial tagmata under the domestikos ton scholon, Pothos Argyros, against the forces of the Bulgarian tsar, Simeon I r. 893927 during the 