A Vancouver man who previously pleaded guilty to stabbing his friend in the chest was sentenced Friday to 1 1/2 years in prison, court records show. Christopher Ollar, 31, entered the guilty plea to second-degree assault earlier this month in Clark County Superior Court for the Sept. 3 stabbing at Ollar’s residence in Vancouver’s Ogden neighborhood. According to an affidavit of probable cause, Vancouver police were called about 11:20 p.m.