Anchor: Because they're supposed to be dismantled at the end of each season, most are somewhat makeshift, but they are nonetheless convenient and appealingly strong on atmosphere.
Entailed: They are strong and convenient and are seasonal.
Contradiction: They are here to stay so they are made to be very sturdy.
Contradiction: There is nothing interesting here.
Contradiction: A dog is running.
Contradiction: The child is sleeping.
Contradiction: A man is playing a musical instrument.