 Complete the following phrase:  The historian Konstantinos Moustakas has traced the descent of Pseudo-Sphrantzes report, via Francesco Sansovinos Annali Turcheschi, to a similar story recorded by Theodore Spandounes about the descent of the Seljuk sultan Kayqubad I , who fits the timeframe in question. However, Spandounes himself considered this story as false, even though he also stresses that the Ottoman sultan Mehmed II, the 