<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _Triple(S):
 """Procedure to calculate the triple point pressure and temperature for seawater Parameters S : float Salinity, [kg/kg] Returns ------- prop : dict Dictionary with the triple point properties: * Tt: Triple point temperature, [K] * Pt: Triple point pressure, [MPa] References IAPWS, Advisory Note No. 5: Industrial Calculation of the Thermodynamic Properties of Seawater, http://www.iapws.org/relguide/Advise5.html, Eq 7 """

    def f(parr):
        T, P = parr
        pw = _Region1(T, P)
        gw = pw["h"]-T*pw["s"]

        pv = _Region2(T, P)
        gv = pv["h"]-T*pv["s"]

        gih = _Ice(T, P)["g"]
        ps = SeaWater._saline(T, P, S)

        return -ps["g"]+S*ps["gs"]-gw+gih, -ps["g"]+S*ps["gs"]-gw+gv

    Tt, Pt = fsolve(f, [273, 6e-4])

    prop = {}
    prop["Tt"] = Tt
    prop["Pt"] = Pt
    return prop