Complex sentence: The juice of the lemon is about 5% to 6% citric acid, giving the fruit its distinctive, sour taste and making it a key ingredient in drinks and foods such as lemonade and lemon meringue pie.
Split into simpler sentences: The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sour taste. The distinctive sour taste of lemon juice makes it a key ingredient in drinks and foods such as lemonade and lemon meringue pie.