Given a sentence in Tagalog language, translate the sentence to English language keeping the meaning of the original sentence intact.

[EX Q]: Tagalog sentence: Ang kawalan ng kaalaman ng mga tauhan ng gawa ng kalendaryo ng tumpak na mas mababa kaysa sa mga ito ay dapat ngunit ito ay nagmula sa paggamit sa 1075 at lasted tungkol sa 20 taon bago na papalitan.
[EX A]: The inefficiency of the staff made the calendar less accurate than it should have been but it came into use in 1075 and lasted about 20 years before being replaced.

[EX Q]: Tagalog sentence: Ang mga tampok na Tsina Guangdong IP65 LED products tagagawa at nakalista dito ay sourced ng karnar sa pag-iilaw.
[EX A]: The featured China GuangDong IP65 Led products manufacturers and listed here are sourced by the karnar lighting.

[EX Q]: Tagalog sentence: Ang libro ay naglalaman ng kanyang unang bahagi ng pananaliksik sa Fourier transforms sa komplikadong domain na kung saan ay binuo mula sa kanyang pag-aaral ng Paley - Wiener libro na kung saan nagsimula ang kanyang karera sa pananaliksik.
[EX A]:
The book contains his early researches on Fourier transforms in the complex domain which had developed from his study of the Paley - Wiener book which began his research career.