We report the result of our search for the 380 GHz H _ { 2 } O line emissions from the quadruply lensed QSO MG J0104+0534 at z = 2.639 with the Atacama Large Millimeter/submillimeter Array ( ALMA ) .
Our observation shows a tentative detection of the 380 GHz line from the lensed QSO , and line spectrum shows a broad spectral distribution that has a velocity width of \sim 290 km s ^ { -1 } and a peak flux of \sim 0.8 mJy .
The integrated-intensity map of the H _ { 2 } O line show lensed emissions at the A1 and A2 component of the QSO , with the A2 component slightly resolved .
The integrated line flux ratio between the A1 and A2 component shows unexpected difference with the continuum flux ratio .
Based on our gravitational lens modeling assuming our tentative detection is real , this flux ratio anomaly would suggest that the 380 GHz line emissions come from two or three spatially displaced locations in the QSO , with the dominant one located at the position of the continuum emission from the QSO and the other one ( s ) displaced from the continuum by \sim 1.5 kpc on the source plane .