A la izquierda de la puerta hay un estante con libros antiguos.
 In English, the translation of the sentence "A la izquierda de la puerta hay un estante con libros antiguos." would be:

"To the left of the door there is a shelf with ancient books."

This simple instruction directs attention to an item's location relative to another object. It doesn't involve complex actions or require subjective interpretation, making it straightforward and not open-ended in nature.