What are the keywords in the following sentence? a graduate acknowledges his family and friends as he enters the stadium .
acknowledge, family, friend, graduate, stadium

What are the keywords in the following sentence? the sun beginning to break through the wintry cloud on cold morning
begin, cloud, morning

What are the keywords in the following sentence? students gather on the campus
campus, gather, student

What are the keywords in the following sentence? happy family have fun lying on the grass .
fun, grass, lie