You are given a sentence and your task is to generate another sentence that supports the given input.

Example Input: A saturated solution contains the maximum amount of solute that can be dissolved at a given temperature.
Example Output: If a solution contains so much solute that its solubility limit is reached, the solution is said to be saturated.

Example Input: Phototropism and gravitropism function to differentially adjust the position of the plant's major organ systems so that, regardless of how the seed is orientated in the soil, the shoot grows up into the sunlight and the roots grow down into the soil for water and mineral absorption.
Example Output: Gravitropism ensures that roots grow into the soil and that shoots grow toward sunlight.

Example Input: The significance of these changes lies in the demonstration that they were associated with the release of calcium ion, which as a 'second messenger', was proposed in turn to activate systems that direct development of the early stages of the parasite (94).
Example Output:
Calcium ion is an example of a second messenger.

