<?xml version="1.0" encoding="UTF-8"?>
<response><unit><id>e1bffe01-2201-4512-b862-2b15a46743b8</id><parent_id>427b72b3-34df-4ebc-833b-eeab304b9428</parent_id><number>2.12.5</number><names>[{"lang":"es","name":"Fórmula de Herón para el área de un triángulo"},{"lang":"en","name":"Heron's formula for the area of a triangle"},{"lang":"ca","name":"Fórmula d'Herón per l'àrea d'un triangle"}]</names><difficulty>3</difficulty><created>18/7/16 11:43</created><modified>18/7/16 11:43</modified></unit></response>
