x <- data.frame(end = c("source: from animal origin as Vitamin A / alltrans-Retinol: Fish in general, liver and dairy products;","source: Eggs, liver, certain fish species such as sardines, certain mushroom species such as shiitake","source: Leafy green vegetables such as spinach; egg yolks; liver"))
[1] "from animal origin as Vitamin A / alltrans-Retinol"
[2] "Eggs, liver, certain fish species such as sardines"
[3] "Leafy green vegetables such as spinach; egg yolks"