Detailed Instructions: Given a sentence in Tagalog language, translate the sentence to English language keeping the meaning of the original sentence intact.
Q: Tagalog sentence: ... isang mahaba at matagal imbestigasyon, na kung saan kinakailangan marami kasakdalan ng detalye pati na rin ang katalinuhan ng mga kuru-kuro.
A:
... a long and sustained investigation, which required much perfection of detail as well as brilliance of conception.