At the top of the hill is the imposing medieval fortress of Kadifekale.
( ( At ( ( the top ) ( of ( the hill ) ) ) ) ( ( ( is ( the imposing ) ) ( ( medieval fortress ) ( of Kadifekale ) ) ) . ) )
(ROOT (S (PP (IN At) (NP (NP (DT the) (NN top)) (PP (IN of) (NP (DT the) (NN hill))))) (VP (VBZ is) (NP (DT the) (NN imposing))) (NP (NP (JJ medieval) (NNS fortress)) (PP (IN of) (NP (NNP Kadifekale)))) (. .)))
In medieval times, the fortress withstood many attacks.
( ( In ( medieval times ) ) ( , ( ( the fortress ) ( ( withstood ( many attacks ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (JJ medieval) (NNS times))) (, ,) (NP (DT the) (NNS fortress)) (VP (VBD withstood) (NP (JJ many) (NNS attacks))) (. .)))