ASD :

turtle ::= Turtle(phrase*)
phrase 	::= Phrase(sujet, aff*)
aff ::= Aff(verbe, complement*)
sujet ::= Sujet(String)
complement ::= Complement(String)
		|Text(String)
verbe ::= verbe(String)


turtle ::= Turtle(phrase*)
phrase 	::= Phrase(String, aff*)
aff ::= Aff(String, complement*)
complement ::= Complement(String)
		|Text(String)


turtle ::= Turtle(phrase*)
phrase 	::= Phrase(entity, aff*)
aff ::= Aff(entity, complement*)
complement ::= Complement(Entity)
		| Complement_Text(String)
entity ::= Entity(String)