The answer to "what else" clearly depends on what is already known! You have chosen not to share that information and so the question cannot be answered.
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Bc= qr
That depends on which sides have not been proven congruent yet.
Line segment BC is congruent to Line Segment YZ
We don't know what has already been proven congruent, sowe're in no position to be able to say what elseis required.
For a start, you would need to know what efg and jkl are.