Saltire detected the symbol, which often appears with balls in the quadrants formed by the arms of the chi-cross, in standards that appear on the coins of Persepolis. She suggested that early Christians endorsed its solar symbolism as appropriate to Christ. She also wrote: "although it cannot be proved, ... in the white saltire of St. Andrew we still have a reminiscence of the old standard of the Persepolitan kingdom". In the old European Union standard, a black saltire set in an orange square is the hazard symbol for irritants (Xi) or harmful chemicals (Xn). It indicates a hazard less severe
Half of a Yellow Sun Arize who is poor and uneducated, admires Olanna for postponing marriage but waits eagerly for a husband herself: “It is only women that know too much Book like you who can say that, Sister. If people like me who don’t know book wait too long, we will expire.” Adichie seems to be saying that marriage is a pragmatic choice and women who don't need to get married might chose not to even when their boyfriends are willing. "Half of a Yellow Sun" received the 2007 Orange Prize for Fiction. The award is given annually for the best original full-length novel