Complex sentence: "Je t'aime" made UK chart history in that on 4 October 1969 and the following week on 11 October, the song was at two different chart positions even though it is the same song, the same artists, and the same recorded version.
Split into simpler sentences: Je t'aime made UK chart history in that on 4 October 1969 and the following week on 11 October. The song was at two different chart positions even though it is the same song, the same artists, and the same recorded version.