Believing that they would need access to an increased water supply , they chose the Tryweryn Valley , near Bala , even though the development would require flooding the village of Capel Celyn .
VERB SCONJ PRON AUX VERB NOUN ADP DET VERB NOUN NOUN , PRON VERB DET PROPN PROPN , SCONJ PROPN , ADV SCONJ DET NOUN AUX VERB VERB DET NOUN ADP PROPN PROPN .