The ice that has already melted has gained its latent heat, so it will cause an error in the calculations unless it is removed.
(The ice; has melted; T:already) (The ice that has already melted; has gained; its latent heat) (it; will cause; an error) (it; is removed; )
The ice The ice that has already melted it it
has melted has gained will cause is removed
T:already
its latent heat
an error