After modifications , the DBR2 engine was used in the DB4 ( 1958 ) , DB5 ( 1963 ) , DB6 ( 1965 ) and DBS ( 1967 ) .
Head entity: db4 Q290857 10
Tail entity: db5 Q749871 15
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156