A{L#→B#,B#→BNAME,BNAME→AUTH,AUTH→BIRTH}
B{L#→B#,B#→(BNAME,AUTH,BIRTH))
C{B#→(BNAME,AUTH),AUTH→BIRTH)
D{(L#,B#)→BNAME,B#→AUTH,AUTH→BIRTH)
A{L#→B#,B#→BNAME,BNAME→AUTH,AUTH→BIRTH}
B{L#→B#,B#→(BNAME,AUTH,BIRTH))
C{B#→(BNAME,AUTH),AUTH→BIRTH)
D{(L#,B#)→BNAME,B#→AUTH,AUTH→BIRTH)
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