This is the 5624th most frequent German word.
bilal
"Bilal" is not a German word; it is a proper name of Arabic origin.
In this sentence, 'Bilal' is used as a proper noun referring to an individual.
Bilal ist heute nicht in der Schule.
Bilal is not at school today.
Here, 'Bilal' is again used as a proper noun, specifying a person with whom the song evokes memories.
Das Lied erinnert mich an Bilal.
The song reminds me of Bilal.
'Bilal' is employed as a direct reference to someone to whom the request can be relayed.